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Center for THz-driven Biological Systems

교수님사진.jpg

 

Gun-Sik Park

 

Professor

Department of Physics and Astronomy,

Seoul National University, Seoul 151-747, Korea

 

Address : 56-323, Department of Physics and Astronomy, Seoul National University

Mobile Phone : +82-10-5408-7749

E-mail : gunsik(at)snu.ac.kr

 

 

Education


Mar. 1974 ~ Feb. 1978    Seoul National University (B.S. in Physics Education)
Mar. 1982 ~ Feb. 1989    University of Maryland, College Park, USA (Ph.D. in Physics)

 

 

Experience (SELECTED)


1995 ~ present              Professor in Department of Physics and Astronomy

  • Seoul National University, Seoul, Korea

2009 ~ Present              Adjunct Professor in School of Electrical Engineering

  • Seoul National University, Seoul, Korea

1987 ~ 1995                 Research Scientist

  • Naval Research Laboratory, Washington DC, USA

(On-site contract from Omega-P, Inc.)

1999 ~ Present              Technical Committee Member

  • IEEE Electron Device Society

2000 ~ 2008                  Director

  • National Research Laboratory for high-power THz radiation

2014 ~ 2017                  Chair

  • IEEE International Society of Infrared, Millimeter and Terahertz Waves
  • International Organizing Committee of International Conference on Infrared, Millimeter and Terahertz Waves

2007 ~ Present               Vice-president

  • Korea Terahertz Forum

2009 ~ Present               Director

  • Center for THz-Bio Application Systems, Seoul National University

2011 ~ 2015                  Director

  • National Center for Inter-University Research Facilities, SNU

2010 ~ 2012                  Topic Editor

  • IEEE Trans. On Terahertz Science and Technology

2009 ~ Present            Founder

  • Seoul-Teracom, Inc.

 

 

Selected Publication of Gun-Sik Park (SCI papers)


"Gain Broadening of Two-Stage Tapered Gyro-TWT Amplifier" Phys. Rev. Lett. (1995)

"Observation of Coherent Millimeter Wave Radiation in a Folded Waveguide”, Phys. Rev. Lett. (1996)

"Compact Free Electron Laser", Nuclear Instrument and Methods in Physics Research A (1997)

"Influence of beam head effects on high-power Klystron amplifier" J. Appl. Phys., (2001)

"Study on Velocity Spread for Axis-Encircling Electron Beams " Appl. Phys. Lett., (2002)

"Positive Phase-Velocity-Tapering of Broadband Helix TWTs ", Appl. Phys. Lett., (2002)

"Novel Concepts of Vacuum Microelectronic Microwave Devices " Phys. Plasmas, (2002)

"Non-stationary behavior in a delayed feedback", Phys. Plasmas, (2004)

"Experimental Verification of Low-Velocity Spread", Appl. Phys. Lett., (2004)

"Electron pre-bunching by electric priming achieved with anode shape modification", Appl. Phys. Lett.,(2005)

"Enhancement of backward-wave interaction by external feedback", Phys. Plasmas, (2005)

"Theoretical Analysis of cross-talking signals between counter-streaming beams", Phys. Plasmas, (2006)

“Microfabrication by Two-Step Deep Etch X-Ray Lithography", Appl. Phys. Lett., (2006)

"Super-radiant Smith-Purcell radiation" Appl. Phys. Lett., (2006)

"High Order Mode Photonic-Band-Gap (PBG) Cavity", Appl. Phys. Lett., (2007)

"Superradiant Terahertz Smith-Purcell Radiation from Surface-Plasmon Excited ", Appl. Phys. Lett., (2007)

"Evanescent Tunneling of an Effective Surface Plasmon", Phys. Rev. Lett., (2007)

"Frequency-Dependent Refractive Index of Structured Thick Metal Film," Appl. Phys. Lett., (2007)

"Controlled Vacuum Breakdown in Carbon Nanotube Field Emission", IEEE Trans. Nanotechnology, (2007)

"High order mode oscillation in a terahertz photonic-band-gap klystron", Appl. Phys. Lett., (2008)

“Terahertz field enhancement by a metallic nano slit”, Nature Photonics, (2009)

"Enhanced transmission of electromagnetic waves through 1D plasmonic crystals", OPTICS EXPRESS,(2010)

"Cerenkov radiation in metallic metamaterials". Appl. Phys. Lett. (2010)

“Bulk and surface electromagnetic response of metallic metamaterials Appl. Phys. Lett. (2011)

"Induction of Hair Growth by Insulin-Like Growth Factor-1 Irradiated Hair Follicle Cells." PLoS ONE (2011)

“Terahertz band gaps induced by metal grooves inside parallel-plate waveguides”, OPTICS EXPRESS (2012)

"Dielectric relaxation of water of a lipid bilayer by terahertz time domain spectroscopy", J Chem Phys, (2012)

“Development of dispenser cathode for terahertz vacuum electron devices ”, Appl Surf Sci  (2013)

"High-power femtosecond-terahertz pulse induces a wound response", SCIENTIFIC REPORTS (2013)

"Surface-coupling of Cerenkov radiation from metallic metamaterial " Optics Express (2014)

"High performance CNT point emitter with graphene interfacial layer." Nanotechnology (2014)

“Dielectric relaxation of DNA solution probed by THz spectroscopy” Chem Phys Lett (2015) (Cover article)

“Microwave Funneling through Sub-10 nm Nanogaps”, ACS Photonics 3 (4), 537-542(2016)

 

 

SCI Papers


1. W. Lawson, J. Calame, V. L. Grantstein, G. S. Park, C. D. Striffler and J. Neilson, "The Design of a High Peak Power Relativistic Magnetron Injection Gun" Int J. Electron., vol. 61, pp. 969-984 (1986)

2. J. L. Hirshfield and G. S. Park, "Synchrotron Reasonance Maser" Int J. Infrared and Millimeter Waves, vol. 12, pp. 275-294 (1991)

3. G. S. Park, V. L. Granatstein, P. Latham, C. M. Armstrong, A. K. Ganguly and S. Y. Park, " Phase Stability of Gyroklystron Amplifier" IEEE Trans. Plasma Sci. vol. 19, No. 4, pp. 632-640 (1991)

4. J. L. Hirshfield and G. S. Park, "Electron Beam Cooling by Stimulated Synchtron Emission and Absorption" Phys. Rev. Lett. vol. 66, pp. 2312-2315 (1991)

5. G. S. Park, V. L. Granatstein, S. Y. Park, Armstrong, and A. K. Ganguly, "Experimental Study om the Efficient Operation of Three-cavity Gyroklystorn Amplifier" IEEE Trans. Plasma Sci. vol. 20, No. 3, pp. 224-231 (1992)

6. G. S. Park, J. L. Hirshfield and C. M. Armstrong, "Passive Gyrotron Cavity Loading and Frequency Shift", Int. J. Electron. vol. 72, no. 5 & 6, pp. 921-941 (1992)

7. G. S. Park, V. L. Granatstein, J McAdoo, C. M. Armstrong, A. H. McCurdy and S. Y. Park, "Phase Jitter Reduction in Gyroklystron" Int. J. Electron. vol. 72, no. 5 & 6, pp. 909-920 (1992)

8. H. S. Uhm, G. S. Park, C. M. Armstrong, "A Theory of Cavity Excitation by Modulated Electron Beam in Connection with Application to Klystron Amplifier" Phys. Fluids B 5 (4), pp. 1349-1357 (1993)

9. A. K. Ganguly, G. S. Park, C. M. Armstrong, "Linear Analysis of Backward Wave Oscillations in Azimuthally varying Transverse electric(TE) modes" Phys. Fluids B 5 (5), pp. 1639-1646 (1993)

10. G. S. Park, P. Malouf, V. L. Granatstein, C. M. Armstrong and A. K. Ganguly, "Realization of Improved Efficiently In a Gyroklystron Amplifier" Particle Accelarators, vol. 43, pp. 93-105 (1993)

11. G. S. Park, S. Y. Park, R. Kyser, C. M. Armstrong, A. K. Ganguly, and R. K. Parker, " Experimental Investigation of A Ka-Band Single-Stage Tapered Gyrotron Travelling Wave Amplifier" IEEE Trans. Plasma Sci. vol. 22, pp. 536-543 (1994)

12. A. K. Ganguly, G. S. Park, and C. M. Armstrong "Nonlinear Theory of Harmonic Peniotron and Gyrotron Interaction In a Rising-Sun Slotted Waveguide" IEEE Trans. Plasma Sci. vol. 22, pp. 902-912 (1994)

13. G. S. Park, J. J. Choi, S. Y. Park, C. M. Armstrong, A. K. Ganguly, R. H. Kyser, and R. K. Parker, "Gain Broadening of Two-Stage Tapered Gyro-TWT Amplifier" Phys. Rev. Lett. vol. 74, pp. 2399-2402 (1995)

14. J. J. Choi and G. S. Park, "Coupled Cavity Gyrotron Traveling-Wave-Tube Amplifier" IEEE Trans. Electron Devices, vol. 23, pp. 495 (1995)

15. G. S. Park, C. M. Armstrong, R. H. Kyser anf J. L. Hirshfield, "Linealy Polarized TEn1 Coupler" Int. J. Electron., Jun. (1995)

16. P. M. Malouf, V. L. Granatstein, S. Y. Park, G. S. Park, and C. M. Armstrong, "Performance of a Wideband Three-stage, Mixed Geometry Gyrotwystron Amplifier" IEEE Trans. Electron Devices, vol. 42, no. 9 (1995)

17. K. T. Nguyen, G. S. Park, J. J. Choi, S. Y. Park, and R. K. Parker, "Effects of Beam Velocity Spread on Two-Stage Tapered Gyro-TWT Amplifier" IEEE Trans. Electron Devices, vol. 43, no. 4, (1996)

18. J. J. Choi, C. M. Armstrong, F. Calise, A. K. Ganguly, R. H. Kyser, G. S. Park, R. K. Parker, and F. Wood, "Experimental Observation of Coherent Millimeter Wave Radiation in a Folded Waveguide Employed with a Gyrating Electron Beam, Phys. Rev. Lett., vol. 76, no. 22, pp. 4273-4276 (1996)

19. M. C. Wang, G. S. Park, and J. K. Lee, " A Compact Free Electron Laser Investigation", Int. J. Infrared and Millimeter Waves, vol. 18, no. 4 (1997)

20. M. C. Wang, and G. S. Park, " An Improvement of High Voltage Power Supply for Pseudospark Discharge", Int. J. Infrared and Millimeter Waves, vol. 18, no. 6 (1997)

21. M. C. Wang, Y. Huang, Z. Wang, J.K. Lee, and G. S. Park, "Design and Simulation of a Compact Free Electron Laser with Pseudospark-produced Electron Beam", Nuclear Instrument and Methods in Physics Research A, pp. 393 (1997)

22. J. G. Jin, G. S. Park, and H. S. Uhm, "Propagation Characteristics of a Premodulated Electron Beam", IEEE Trans. Plasma Sci., vol. 26, no. 3, pp. 794-798 (1998)

23. H. J. Ha, S. S. Jung, and G. S. Park, "Theoretical Study for Folded Waveguide Traveling Wave Tube", Int. J. Infrared and Millimeter Waves, vol. 19, no. 9 (1998)

24. J. G. Jin, G. S. Park, "Propagation Characteristics of a Premodulated Electron Beam", J. Vacuum Sci. Technol. B, 15(2), pp.754-757 (1998)

25. H.J. Ha, S.S. Jung and G.S. Park, “Liner Theory a Folded Waveguide Traveling-Wave Tube(TWT)”, J. Korean Phys. Soc., vol. 34, no. 3 pp. 297-300 (1999)

26. H. J. Ha, S. S. Jung, and G. S. Park, "Experimental Investigation of Ku-band Folded Waveguide TWT", Int. J. Infrared & Millimeter Waves, vol. 20, no 12, Dec. (1999)

27. Han S. Uhm and Hyoung S. Kim, Gun-Sik Park "Influence of beam head effects on high-power Klystron amplifier" J. Appl. Phys., vol. 89, no. 8, pp. 4224-4230 (2001)

28. S. S. Jung, A. V. Soukhov and G. S. Park "Large-Signal Simulations of Interaction Between Electron Beam and Traveling Electomagnetic Wave in a Helical Structure" J. Korean Phys. Soc., vol. 39, no. 6, pp. 1087~1094, Dec. (2001)

29. S. S. Jung, A. V. Soukhov and G. S. Park "Diffraction Model for an Interaction Impedance Measurement Using the Nonresonant Method" J. Korean Phys. Soc., vol. 38, no. 6, pp. 762~765, Jun. (2001)

30. S. S. Jung, A. V. Soukhov, and G. S. Park, "Effect of Conductive Perturber Diameter on Nonresonant Measurement of Interaction Impedance for Helical Slow-Wave Structure," IEEE Transactions Microwave Theory and Techniques, vol. 50, no. 9, pp. 2196-2198, Sep. (2002)

31. S. S. Jung, Y. D. Joo, S. Ghosh, B. N. Basu, and G. S. Park, "Synthesis of Dielectric Helix-Supports for Wideband Helix Traveling-Wave Tubes," Microwave and Opt. Technol. Lett., vol. 32, no. 3, pp. 231-235, Feb. (2002)

32. A. V. Soukhov, S. S. Jung, and G. S. Park, "Reflection Suppressing Technique for Nonresonant Microwave Probing," Microwave and Opt. Technol. Lett., vol. 32, no. 4, pp. 287-289, Feb. (2002)

33. Han S. Uhm, Hyong S. Kim and Gun-Sik Park, "Dispersion Relation of the Electromagnetic Waves Propagating Through a Helix Inserted into a Magnetron-type Conducting Cylinder " IEEE Trans. Plasma Sci., vol. 30, no. 3, Jun. (2002)

34. S.S. Jung, C.W. Baik, S.T. Han, S.G. Jeon, Andrei V. Soukhov, Baofu Jia, G.S. Park, H. S. Kim, H. S. Uhm, H. J. Ha, and B. N. Basu, "Wideband Semi-Vane and Heavily Dielectric Loaded Helix Traveling-Wave Tubes", IEEE Trans. Plasma Sci., vol. 30, no. 3, Jun. (2002)

35. Yanyu Wei, Baofu Jia*, G.S. Park, Y.D. Joo, Guofen Yu, Wenxiang Wang, Shenggang Liu, and Han S. Uhm, "Theory of High-Power Wideband Traveling-Wave Tube using Coaxial Inverted Helical Groove Slow-Wave Structure" IEEE Trans. Plasma Sci., vol. 30, no. 5, pp. 2010-2018, Oct. (2002)

36. S. G. Jeon, C. W. Baik, D. H. Kim and G. S. Park, N. Sato and K. Yokoo "Study on Velocity Spread for Axis-Encircling Electron Beams Generated by Single Magnetic Cusp" Appl. Phys. Lett., vol. 80, no. 20, pp. 3703-3705, May (2002)

37. S.S. Jung, Andrei V. Soukhov, Baofu Jia and G.S. Park, "Positive Phase-Velocity-Tapering of Broadband Helix TWTs for Efficiency Enhancement", Appl. Phys. Lett., vol. 80, no. 16, pp. 3000~3002, Apr. (2002)

38. S. S. Jung, A. V. Soukhov, G. S. Park and B. N. Basu "Efficiency Enhancement and Harmonic Reduction of Wideband Helix Traveling-Wave Tubes with a Positive Phase-Velocity-Tapering" Japanese J. Appl. Phys., vol. 41, no. 6A, pp. 4007-4013, Jun. (2002)

39. A. G. Rozhnev, N. M. Ryskin, D. V. Sokolov and D. I. Trubetskov, S. T. Han, J. I. Kim and G. S. Park, "Novel Concepts of Vacuum Microelectronic Microwave Devices with Field Emitter Cathode Arrays" Phys. Plasmas, vol. 9, no. 9, pp. 4020-4027, Sep. (2002)

40. Wei Yanyu, Wang Wenxiang, Jiahong Sun, Shenggamg Liu, Baofu Jia, Gun-Sik Park "Dielectric Effect on the RF Characteristics of a Helical Groove Traveling Wave Tube" Chinese J. Phys., vol 11, no. 3 pp. 277~281 Mar. (2002)

41. S. G. Jeon, C. W. Baik, D. H. Kim and G. S. Park, N. Sato and K. Yokoo "Analysis of Axis-Encircling Electron Beam Using a Single-Cusp Magnetic Field" Japanese J. Appl. Phys., vol. 41, no. 8, pp. 5404-5407, Aug. (2002)

42. S. S. Jung, A. V. Soukhov, and G. S. Park, "Comparison of 2-D PIC Simulation with 1-D Nonlinear Theory in Helix Traveling-Wave Tube," Microwave and Opt. Technol. Lett., vol. 34, no. 6, pp. 451-454, Sep. (2002)

43. Young-Do Joo, Ashok Kumar Sinha, BaoFu Jia, and Gun-Sik Park, "Electromagnetic wave propagation through azimuthally asymmetric helical slow wave structure," Japanese J. of Appl. Phys., vol. 42, no.12, pp. 7585-7593, Aug. (2003)

44. S.T. Han, J.I. Kim and G.S. Park, "Design of Folded Waveguide Traveling-Wave Tube", Microwave and Opt. Technol. Lett., vol. 30, no. 2, pp. 161-165, Jul. (2003)

45. Young-Do Joo, Ashok Kumar Sinha, Yanyu Wei, and Gun-Sik Park, "Simplified Approach to the Nonlinear Analysis in Helix Slow-Wave-Structure for a Traveling Wave Tubes," Japanese J. of Appl. Phys., vol. 42, no. 11, pp. 7104-7111, Oct. (2003)

46. C.W. Baik, S.G. Jeon, and G.S. Park, "Ballistic bunching theory of electron cyclotron resonance masers," J. Korean Phys. Soc., vol. 43, no. 6, pp. 1112-1119, Dec. (2003)

47. Y.M. Shin, G.S. Park, G.P. Scheitrum, "Novel coupled-cavity TWT structure using two-step LIGA fabrication", IEEE Trans. Plasma Sci., vol. 31, no. 6, pp. 1317-1324, Dec. (2003)

48. Y.Y. Wei, Wenxiang Wang, Baofu Jia, Jiahong Sun, A.K. Sinha, S.G. Liu, and G.S. Park, "Experimental Demonstration of the Effect of Groove Shape on the Wave Properties of the Helical Groove Waveguide", IEEE Trans. Microwave and Wireless Components Lett., vol. 13, no. 11, pp. 484-486, Nov. (2003)

49. N. M. Ryskin, V. N. Titov, S. T. Han, J. K. So, K. H. Jang, Y. B. Kang, and G. S. Park, "Non-stationary behavior in a delayed feedback traveling wave folded waveguide oscillator", Phys. Plasmas, vol. 11 no. 3, pp. 1194-1202, Mar. (2004)

50. S.G. Jeon, C.W. Baik, D.H. Kim and G.S. Park, "Experimental Verification of Low-Velocity Spread Axis-encircling Electron Beam", Appl. Phys. Lett., vol. 84, no. 11, Mar. (2004)

51. Y. B. Kang, D. H. Kim, V. N. Titov, N. M. Ryskin, and G. S. Park, "Chaotic Oscillation in a Relativistic Backward-Wave Oscillator (RBWO) using PIC Simulation", J. Korean Phys. Soc., vol. 44, no. 2, pp. 326-332, Feb. (2004)

52. S.T. Han, K.H. Jang, J.K. So, J.I. Kim, Y.M. Shin, Nikita M. Ryskin, S.S. Chang and G.S. Park, "Low-voltage Operation of Ka-band Folded Waveguide Traveling-Wave Tube", IEEE Trans. Plasma Sci., vol. 32, no. 1, pp. 60-66, Feb. (2004)

53. D. H. Kim, H. C. Jung, Y. B. Kang, and G. S. Park, "Numerical Study on Rippled-Wall Slow-Wave Structure for Backward Wave Oscillator," J. Korean Phys. Soc., vol. 44, no. 5, pp.1298-1302, May (2004)

54. C.W. Baik, S.G. Jeon, D.H. Kim, and G.S. Park, "Frequency multiplication in a harmonic electron cyclotron resonance maser," J. Korean Phys. Soc., vol. 44, no. 5, pp.1308-1312, May (2004)

55. Jung-Il Kim, Jong-Hyo Won and G.un-Sik Park, Hyun-Jun Ha and Jong-Chull Shon. "Numerical Study of 10-Vane Strapped Magnetron Oscillator", J. Korean Phys. Soc., vol. 44, no. 5, pp.1229-1233, May (2004)

56. Y. D. Joo, A. K. Sinha, and G. S. Park, "Development of Stationary One-dimensional Nonlinear Helix Traveling Wave Tube Code based on Lagrangian Disk Model", J. Korean Phys. Soc., vol. 44, no. 5, pp.1313-1317, May (2004)

57. S. T. Han, K. H. Jang, J. K. So, N. M. Ryskin, and G. S. Park, "Operation of Delayed Feedback Oscillator using Electron Beam and Traveling-Wave in Folded Waveguide", J. Korean Phys. Soc., vol. 44, no. 5, pp. 1261-1264, May (2004)

58. Y. M. Shin, G. S. Park, G. P. Scheitrum and G. Caryotakis, "Circuit Analysis of an Extended Interaction Klystron", J. Korean Phys. Soc., vol. 44, no. 5, pp. 1239-1245, May (2004)

59. J.I. Kim, J.H.Won, H.J. Ha, J.C. Shon, G. S. Park, "Three-Dimensional Particle-In-Cell Simulation of 10-Vane Strapped Magnetron Oscillator" IEEE Trans. Plasma Sci., Vol. 32, No. 5, pp. 2099-2104, Oct. (2004)

60. S.S.Jung, Y.S.Jin and H.S.Lee, J.I.Kim, "Three-Dimensional Particle-In-Cell Simulation of 10-Vane Strapped Magnetron Oscillator", J. Korean Phys. Soc., vol. 44, no. 5, pp. 1250-1255, May (2004)

61. J.I. Kim, D.W. Kim, In.K. Yoo, Y.Y. Wei, G.S. Park, "Relativistic Focus Condition for E-beam projection Lithography", Japanese J. of Appl. Phys., Vol. 43, No. 12. pp. 8044-8047, Dec. (2004)

62. C. W. Baik, S. G. Jeon, D. H. Kim, N. Sato, K. Yokoo, and G. S. Park, ``Third-Harmonic Frequency Multiplication of a Two-Stage Tapered Gyrotron Traveling-Wave Tube Amplifier,'' IEEE Trans. Electron Dev., vol. 52, no. 5, pp829-837, May (2005)

63. J. I. Kim, J. H. Won and G. S. Park, "Electron pre-bunching in microwave magnetron by electric priming achieved with anode shape modification", Appl. Phys. Lett., Vol 86, No 14, pp171501-17153, Apr. (2005)

64. S. T. Han, S. G. Jeon, Y. M. Shin, K. H. Jang, J. K. So, J. H. Kim, S. S. Chang, and G. S. Park, "Experimental Investigations on Miniaturized High Frequency Vacuum Electron Devices", IEEE Trans. Plasma Sci., Vol. 33, No. 2, pp679-684, Apr. (2005)

65. S. T. Han, J. K. So, K. H. Jang, Y. M. Shin, J. H. Kim, S. S. Chang, N. M. Ryskin and G. S. Park, "Investigations on a Micro-Fabricated Folded Waveguide Traveling-Wave Tube Oscillator", IEEE Trans. Electron Dev., vol. 52, no. 5, pp702-708, May (2005)

66. S. T. Han, K. H. Jang, J. K. So, N. M. Ryskin and G. S. Park, "Enhancement of backward-wave interaction by external feedback", Phys. Plasmas, vol. 12, no. 8, pp83103-83108, Aug. (2005)

67. Y. M. Shin, J. H. Won, S. T. Han, N. M. Ryskin, and G. S. Park, "Theoretical Analysis of cross-talking signals between counter-streaming electron beams in a vacuum tube oscillator", Phys. Plas., Vol. 13, No. 3, Feb. (2006)

68. Y. M. Shin, J. K. So, J. H. Kim, S. T. Han, K. H. Jang, S. S. Chang, and G. S. Park, “Microfabrication of Millimeter Wave Vacuum Electron Devices by Two-Step Deep Etch X-Ray Lithography", Appl. Phys. Lett., Vol. 88, No. 9, pp091916-3, Feb. (2006)

69. J. I. Kim, J. H. Won, H. J. Ha, J. C. Shon and G. S. Park, "Reduction of noise in strapped magnetron by electric priming using anode shape modification", Appl. Phys. Lett., Vol.88, No. 22, pp2215011-3, Jun. (2006)

70. G. Singh, M. V. Kartikeyan, and G. S. Park, “Gain and Bandwidth Analysis of A vane-Loaded Gyro-TWT”, International Journal of Infrared and Millimeter Waves, vol. 27, no. 3, pp. 333-341, March (2006)

71. D.Li, K.lmasaki, Z.Yang, and Gun-sik Park, "Three-dimensional simulation of super-radiant Smith-Purcell radiation" Appl. Phys. Lett., Vol.88, No. 201501, May. (2006)

72. D. Li, Z. Yang, K. Imasaki, and Gun-Sik Park, "Particle-in-cell simulation of coherent and superradiant Smith-Purcell radiation", Physical Review Special Topics, vol. 9, PP. 040701, April. (2006)

73. D. Li, K. Imasaki, Z. Yang, Gun-Sik Park, S. Miyamoto, S. Amano, T. Mochizuki, "Effect of grating surface loss on the Smith-Purcell free-electron laser", Nuclear Instruments and Methods in Physics Research A, Vol. 572, pp 948-952, December. 2006

74. S. G. Jeon, Y. M. Shin, K. H. Jang, S. T. Han, J. K. So and G. S. Park, "High Order Mode Formation of Externally Coupled Hybrid Photonic-Band-Gap (PBG) Cavity", Appl. Phys. Lett., Vol. 90, No.021112, January (2007)

75. Young-Min Shin, Jin-Kyu So, Kyu-Ha Jang, Jong-Hyo Won, Jung-Il Kim, Anurag Srivastava, and Gun-Sik Park, "Superradiant Terahertz Smith-Purcell Radiation from Surface-Plasmon Excited by Counter-Streaming Electron Beams", Appl. Phys. Lett., Vol. 90, No. 031502, Jan. (2007)

76. D. H. Kim, H. C. Jung, S. H. Min, S. H. Shin, and G. S. Park,"Dynamics of Mode Competition in a Gigawatt-class Magnetically Insulated Line Oscillator" ,Appl. Phys. Lett., Vol 90, 124103, Feb. (2007)

77. Young-Min Shin, Jin-Kyu So, Kyu-Ha Jang, Jong-Hyo Won, Anurag Srivastava, and Gun-Sik Park,"Evanescent Tunneling of an Effective Surface Plasmon Excited by Convection Electrons", Phys. Rev. Lett., Vol 99, pp 147402, October. (2007)

78. Young-Min Shin, Jin-Kyu, So, Jong-Hyo Won, Sang-Hoon Kim, and Gun-Sik Park, "Frequency-Dependent Refractive Index of One-Dimensionally Structured Thick Metal Film," Appl. Phys. Lett., Vol. 91, No. 3, 031102, July. (2007)

79. G. S. Park, Y. M. Shin, J. K. So, S. T. Han, K. H. Jang, J. H. Kim, and S. S. Chang , "Feasibility Study of Two-Step LIGA-Fabricated Circuits Applicable to Millimeter/Submillimeter Wave Sources", AIP Conf. Proc. 807, 299 (2006)

80. Dazhi Li, Kazuo Imasaki Ziqiang Yang, Gin-Sik Park, Shiji Miyamoto, Sho Amano , and Takayasu Mochizuki, "Smith-Purcell Radiation with Three-Dimensional Simulation", Japanese Jounal of Applied Physics, Vol. 46, No. 2, pp 601-604, February. 2007

81. Chan-Wook Baik, Jeonghee Lee, Deuk Seok Chung, Seong Chan Jun, Jun Hee Choi, Byung Kwon Song,Min Jong Bae, Tae Won Jeong, Jung Na Heo, Yong Wan Jin, Jong-Min Kim, Member, IEEE, SeGi Yu, Kyu-Ha Jang, and Gun-Sik Park, Member, IEEE , "Improvement of Field-Emission Characteristics of Carbon Nanotubes by Post Electrical Treatment", IEEE Trans. Electron. Dev., Vol. 54, No. 9, pp 2392-2402 September. (2007)

82. N. M. Ryskin, S. T. Han, K. H. Jang, and G. S. Park, "Theory of the microelectronic traveling wave klystron amplifier with field-emission cathode array", Physics of Plasmas, Vol. 14, No. 9, pp093106, September. (2007)

83. Wenxin Liu, Ziqiang Yang, Zheng Liang, D. Li, K. Imasaki, Zongjun Shi, Feng Lan, Gun-Sik Park, "Enhancement of terahertz Smith–Purcell radiation by two electron beams", Nuclear Instruments and Methods in Physics Research A, Vol. 580, pp 1552-1558, August. (2007)

84. Chan-Wook Baik, Jeonghee Lee, Deuk Seok Chung, Jun hee Choi, In-Taek Han, Ha Jin Kim, Shang Hyeun Park, Sun Il kim, Yong Wan Jin, Jonh-Min Kim, Member, IEEE, Jin Young Kim, SeGi Yu, Kyu-Ha Jang, and Gun-sik Park, Member, IEEE, "Controlled Vacuum Breakdown in Carbon Nanotube Field Emission", IEEE Trans. Nanotechnology, Vol. 6, No. 6, pp 727-733, November. (2007)

85. Yanyu Wei, Hongtao Liu, Jun He, Yubin Gong, Lingna Yue, Wenxiang Wang, Gun-Sik Park, "The small signal analysis of a centered dielectric-rod loaded, arbitrarily-shaped helical groove", Int J Infrared Milli Waves, Vol.28, pp.1051-1062, September. (2007)

86. D. Li, K. Imasaki, X. Gao and Z. Yang, Gun-Sik Park, "Reduce the start current of Smith-Purcell backward wave oscillator by sidewall grating", Appl. Phys. Lett., Vol. 91, No. 221506, November. (2007)

87. Wenxin Liu, Ziqiang Yang, Zheng Liang, Dazhi Li, Kazuo Imasaki, Zongjun Shi, Feng Lan, Gun-Sik Park, and Shenggang Liu, “Enhancements of Terahertz Radiation From a Grating Waveguide by Two-Stream Instability”, IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 36, NO. 3, pp 748-756, June (2008)

88. Kyu-Ha Jang, Seok-Gy Jeon, Jung-Il Kim, Jong-Hyo Won, Jin-Kyu So, Seung-Ho Bak, Anurag Srivastava, Sun-Shin Jung, and Gun-Sik Park, "High order mode oscillation in a terahertz photonic-band-gap multibeam reflex klystron", Appl. Phys. Lett., Vol. 93, No. 211104, 25 November (2008)

89. M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit”, Nature Photonics, Vol. 3, No. 152 (2009)

90. Young-Do Joo, Gun-Sik Park, Dae-Ho Kim, Jung-Il Kim, Seok-Gy Jeon, Seong-Tae Han, Sun-Shin Jung, Jong-Uk Kim, “Design of a Third-Harmonic Gyrotron Oscillator Using a Photonic Crystal Cavity ”, Japanese journal of applied physics, Vol. 48 No. 7, pp. 074502-1~074502-5, 21 July (2009)

91. Anurag Srivastava, Jin-Kyu So, Yiman Wang, Jinshu Wang, R.S. Raju, Seong-Tae Han, and Gun-Sik Park, “Design of Sheet-Beam Electron Gun with Planar Cathode for Terahertz Devices”, Journal of Infrared, Vol. 30, No. 7, pp. 670-678, July (2009)

92. Lili Li, Yiman Wang, Wei Liu, Yanchun Wang, Jinshu Wang, Anurag Srivastava, Jin-Kyu So, and Gun-Sik Park, “Development of High-Current Sheet Beam Cathodes for Terahertz Sources”, IEEE TRANSACTIONS ON ELECTRON DEVICES, Vol. 56, No. 5, pp 762-768, May (2009)

93. Wang ZL, Gong YB, Wei YY, Duan ZY, Gong HR, Lu ZG, Yue LN, Yin HR, Xu J, Li YB, Liu PK, Park GS, "Stable Sheet-Beam Transport in Periodic Nonsymmetric Quadrupole Field", IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 38, NO. 1, JAN (2010)

94. H. C. Jung, S. H. Min, G. S. Park, J. An, S. H. Lee, Y. J. Yoon, J. Y. Kim, J. H. Choi, J. H. So, and M. Petelin "Transmission of gigawatt-level microwave using a beam-rotating mode converter in a relativistic backward wave oscillator" Appl. Phys. Lett. Vol.96, No.131502, March (2010)

95. Liao ML, Wei YY, He J, Gong YB, Wang WX, Park GS, "Large-Signal Simulations of a Novel Folded Waveguide Traveling-Wave Tube", CHINESE JOURNAL OF ELECTRONICS, VOL. 19, NO. 2, APR (2010)

96. Wang ZL, Gong YB, Wei YY, Duan ZY, Gong HR, Yue LN, Yin HR, Lu ZG, Xu J, Chen BR, Liu PK, Park GS, "The Conditions for Stable Sheet Electron Beams Transport in Periodic Permanent Magnet Fields", JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES, VOL. 31, NO. 6, JUN (2010)

97. Sun-Hong Min, Hoe-Chun Jung, Gun-Sik Park, Jihwan Ahn, Sang Heun Lee, Young Joong Yoon, Junyeon Kim, Jun-Ho Choi, and Joonho So, “Mode Conversion of High-Power Electromagnetic Microwave Using Coaxial-Beam Rotating Antenna in Relativistic Backward-Wave Oscillator”, IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 38, NO. 6, June (2010)

98. Liao ML, Wei YY, Gong YB, He J, Wang WX, Park GS, "A Rectangular Groove-Loade Folded Waveguide for Millimeter-Wave Traveling-Wave Tubes", IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 38, NO. 7, JUL (2010)

99. Jin-Kyu So, Hoe-Cheon Jung, Sun-Hong Min, Kyu-Ha Jang, Seung-Ho Bak, and Gun-Sik Park, "Enhanced transmission of electromagnetic waves through 1D plasmonic crystals", OPTICS EXPRESS, Vol. 18, No. 19, 13 September (2010)

100. Jin-Kyu So, Jong-Hyo Won, M. A. Sattorov, Seung-Ho Bak, Kyu-Ha Jang, Gun-Sik Park, D. S. Kim, and F. J. Garcia-Vidal. "Cerenkov radiation in metallic metamaterials". Appl. Phys. Lett. Vol.97, No.151107, October (2010)

101. Thermal Analysis of Strapped Magnetron, Matlabjon Abdurakhimovich Sattorov, Anirban Bera, Ashok Sharma, Won-Jong Kang, Oh-Joon Kwon, Sun-Shin Jung, Dae-Ho Kim, Ki Wook Lee, Jong-Hyo Won, Chan Ho Kook and Gun-Sik Park, IEEE Trans on Electron Devices Vol. 58 , PP. 2784-2788, August (2011)

102. Bulk and surface electromagnetic response of metallic metamaterials to convection electrons Jin-Kyu So,1,a) Kyu-Ha Jang,1,b) Gun-Sik Park,1,c) and F. J. Garcia-Vidal2 Appl. Phys. Lett.  99, 071106 (2011)

103. Investigation on a W band Ridge-Loaded Folded Waveguide TWT, J. He, Y. Wei, Y. Gong, W. Wang, and G.-S. Park, IEEE Trans. on Plasma Science, vol 39, no 8, 1660 (2011)

104. John H. Booske, Fichard J. Dobbs, Colin D. Joye, Carol L. Kory, George R. Neil, Gun-Sik Park, Jaehun Park, and Richard J. Temkin, "Vacuum Electronic High Power Terahertz Sources", IEEE Trans. on Terahertz Science and Technology, Sep.(2011)

105. Sun-Young Yoon, Kyu-Tae Kim, Seong Jin Jo, A-Ri Cho, Soon-Ik Jeon, Hyung-Do Choi, Kyu Han Kim, Gun-Sik Park, Jeong-Ki Pack, Oh Sang Kwon, Woong-Yang Park, "Induction of Hair Growth by Insulin-Like Growth Factor-1 in 1,763 MHz Radiofrequency-Irradiated Hair Follicle Cells." PLoS ONE 01/2011; 6(12):e28474.

106. Daeho Kim, Sunshin Jung, Gun-Sik Park, “Rapid Start of Robust Radiation Helped by a Non-competitive Neighbor, Mode in a Gigawatt-class Magnetically Insulated Line Oscillator", Journal of the Korean Physical Society, Vol. 59, No. 6, December 2011, pp. 36573661

107. Eui Su Lee, Jin-Kyu So, Gun-Sik Park, DaiSik Kim, Chul-Sik Kee, and Tae-In Jeon,“Terahertz band gaps induced by metal grooves inside parallel-plate waveguides”, 12 March 2012 / Vol. 20, No. 6 / OPTICS EXPRESS 611

108. Guo Guo, Yanyu Wei, Lingna Yue, Yubin Gong, Xiong Xu, Jun He, Guoqing Zhao, Wenxiang Wang, Gun-Sik Park, "A Tapered Ridge-loaded Folded Waveguide Slow-wave Structure for Millimeter-wave Traveling-wave Tube", vol 33, pp131–140, J Infrared Milli Terahz Waves, 2012

109. Kyu-Ha Jang, Seong Hee Park, Kitae Lee, Gun-Sik Park, and Young Uk Jeong, "High-order photonic bandgap reflex klystron using carbon nanotube multi-beam cathode", Electron. Lett. 7 June 2012. Volume 48, Issue 12, p.707708

110. Matlabjon Sattorov, Eduard Khutoryan, Konstantin Lukin, Ohjoon Kwon, and Gun-Sik Park, ”Improved Efficiency of Backward Wave Oscillator with an Inclined Electron Beam”, IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 60, NO. 1, JANUARY 2013

111. Da-Hye Choi, Heyjin Son, Seonghoon Jung, Jaehun Park, Woong-Yang Park, Oh Sang Kwon, and Gun-Sik Park, "Dielectric relaxation change of water upon phase transition of a lipid bilayer probed by terahertz time domain spectroscopy", Journal of Chemical Physics, Vol.137, No.175101, 2012

112. R.K. Barik, A. Bera, A.K. Tanwar, I.K. Baek, S.H. Min, O.J. Kwon, W.S. Lee, G.-S. Park, “A novel approach to synthesis of scandia-doped tungsten nano-particles for high-current-density cathode applications,” International Journal of Refractory Metals and Hard Materials, vol. 38, pp. 60-66, 2013.

113. R. K. Barik, A. Bera, R.S. Raju, A. K. Tanwar, I. K. Baek, S. H. Min, O. J. Kwon, M. A. Sattorov and G.-S. Park, “Development of alloy-film coated dispenser cathode for terahertz vacuum electron devices application”, Applied Surface Science 276 (2013) 817– 822, 2013

114. Kyu-Tae Kim, Jaehun Park, Sung Jin Jo, Seonghoon Jung, Oh Sang Kwon, Gian Piero Gallerano, Woong-Yang Park, & Gun-Sik Park, "High-power femtosecond-terahertz pulse induces a wound response in mouse skin", Volume 3, 2013, Article number 2296, SCIENTIFIC REPORTS

115. Jo, S. J., et al. (2014). "Biological effects of femtosecond-terahertz pulses on C57BL/6 mouse skin." Annals of Dermatology 26(1): 129-132.

116. Bera, A., et al. (2014). "Surface-coupling of Cerenkov radiation from a modified metallic metamaterial slab via Brillouin-band folding." Optics Express 22(3): 3039-3044.

117. Kwon, O., et al. (2014). "Efficient terahertz oscillation using a half-period staggered grating resonator." Japanese Journal of Applied Physics 53(6): 066201.

118. Lee. J. S., et al. (2014). "High performance CNT point emitter with graphene interfacial layer." Nanotechnology 25(45): 455601.

119. Khutoryan. E., et al. (2015) "Theory of Multimode Resonant Backward Wave Oscillator with an Inclined Electron Beam" IEEE TRANSACTIONS ON ELECTRON DEVICES

120. Sattorov. M., et al. (2015) "Automodulation Processes in Clinotrons With Low-Focusing Magnetic Field." IEEE TRANSACTIONS ON ELECTRON DEVICES

121. Heyjin Son, Da-Hye Choi, Seonghoon Jung, Jaehun Park and Gun-Sik Park, “Dielectric relaxation of hydration water in the Dickerson-Drew duplex solution probed by THz spectroscopy” Chemical Physics Letters 627(0) 134-139

122. Kwanghee Lee, Jeeyoon Jeong, Young-Mi Bahk, Jiyeah Rhie, In-Keun Baek, Bong Jun Lee, Yu Hyun Kang, Seunghun Hong, Gun-Sik Park, and Dai-Sik Kim, “Microwave Funneling through Sub-10 nm Nanogaps”, ACS Photonics 3 (4), 537-542(2016)

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