1. Sung-Hak Cho, Isao Yokota, Minoru Obara, "Free spectral range variation of broadband, high finesse, multi-channel Fabry-Perot filter with chirped fiber gratings" Jpn. J. Appl. Phys., 36, 6383 (1997)(I.F.: 1.60)

2. Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa, "Observation of self-channeled plasma formation and bulk modification in optical fibers using a high-intensity femtosecond laser" Jpn. J. Appl. Phys. Lett. ,37 , L737-739 (1998)(I.F.: 1.60)

3. Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa, and Minoru Obara"Fabrication of double cladding structure in optical fibers using plasma channeling excited by a high-intensity femtosecond laser" Optics Communication. 168, 287-295 (1999) (I.F.: 2.122)

4. Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa, "Femtosecond laser micromachining of TiO/sub 2/ crystal surface for robust optical catalyst" Journal of Applied Physics, 87, 1604-1609 (2000) (I.F.: 2.171)

5. Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa, "Fabrication of internal diffraction gratings in planar silica plates using low-density plasma formation induced by a femtosecond laser" Nuclear Instruments and Methods in Physics Research- Section B, 109, 73-82 (2002) (I.F.: 1.241)

6. Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa, "in situ Observation of dynamics of plasma formation and refractive index modification in silica glasses excited by a femtosecond laser" Optics Communication, 207, pp.243-253 (2002) (I.F.: 2.122)

7. Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa, "Fabrication of multi-core structures in an optical fiber using plasma self-channeling" Optics Express, 11, 1780-1786 (2003) (I.F.: 4.950)

8. I.W. Park, H. Ju, A. Avilov, S.H. Choh, E.K. Koh, Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa, "The irrecoverable change in the refractive index of plasma self-channeled silica fibers using femtosecond optical pulses" Applied Physics Letter, 83, 656-658 (2003) (I.F.: 4.049)

9. Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa, "Fabrication of singlemode waveguide structure in optical multimode fluoride fibers using self-channeled plasma filaments excited by a femtosecond laser" Applied Physics A. 77 ,pp. 359-362 (2003) (I.F.: 1.649)

10. Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa, "In situ observation of dynamics of plasma self-channeling and bulk modification in silica glasses induced by a high-intensity femtosecond laser" Applied Physics A, 76, pp.755-761(2003) (I.F.: 1.649)

11. Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa," Observation of the complex propagation of a femtosecond laser pulse in a dispersive transparent bulk materials" Journal of Optical Society of America B, 20, pp597-602 (2003) (I.F.: 2.250)

12. Sung-Hak Cho, Kumagai Hiroshi, Katsumi Midorikawa" Dynamics of permanent structural transformations in ZBLAN induced by self-channeled plasma filament" Optical materials 26, 57-63, (2004) (I.F.: 1.623)

13. Won-Seok Chang, Mu-Jin Choi, Jae-Goo Kim, Sung-Hak Cho, Kyoung-Hyun Whang, "Sub-micron scale patterning using femtosecond laser and self-assembled monolayers interaction" Applied Surface Science, 240, 296-304 (2005) (I.F.: 1.490)

14. Won-Seok Chang, Jae-Goo Kim, Sung-Hak Cho, Mu-Jin Choi "Micromachining thin film by using near-field photo-patterning of organic self-assembled monolayers" Journal of the Korean Physical Society, 47, 233-236 (2005)

15. Won-Seok Chang, Jae-Goo Kim, Sung-Hak Cho, Kyoung-Hyun Whang "Femtosecond-laser-coupled Near-Field Scanning Optical patterning using self-assembled monolayers" Japanese Journal of Applied Physics, 45, 2082-2086 (2006) (I.F.: 1.60)

16. Sung-Hak Cho, Byung-Hyon Yoo, Hee-Won Im, Won-Seok Chang, Jae-Goo Kim, Kyoung-Hyun Whang, Kyeong-Sook Choi, Seong-Hyang Sohn "in situ UV absorption of single living cell for NIR femtosecond laser cell processing" Submitted to Opt. Express (April. 2007) (I.F.: 5.049)

17. Sung-Hak Cho, Won-Seok Chang, Jae-Goo Kim,, Kyeong-Sook Choi, Seong-Hyang Sohn "in situ Observation of photo-bleaching in human single living cell excited by a NIR femtosecond laser " Applied Surface Science. 254, 3370-3375 (2008) (I.F.: 1.490)

18. Sung-Hak Cho, Won-Seok Chang, Jae-Goo Kim, Kyoung-Hyun Whang "Self-fabricated singlemode waveguide in fluoride glass excited by self-channeled plasma filaments" Applied Physics Letter, 91, 121907 (2007)(I.F.: 3.980)

19. Sung-Hak Cho, Jung-Kyu Park, and Kwang-Yeol Kim “Internal modification in transparent hybrid materials using plasma formation induced by a femtosecond laser” In press, JOURNAL OF CERAMIC PROCESSING RESEARCH (2008)

20. Sung-Hak Cho, Jung-Kyu Park,Won-Seok Chang, Jae-Goo Kim “Removal of nano particles on silicon wafer by self-channeled plasma filaments” Submitted to Applied Physics Letter (2008) (I.F.: 3.980)

21. Won-Seok Chang,Byung-Hyon Yoo,Sung-Hak Cho “Modification of carbon nanotubes templates using femtosecond laser pulses” Japanese Journal Applied Physics 47 (2008) 6998-7001 (2008)(I.F.: 1.600)

22. Jae-Goo Kim,Suk-Joo Na, Sung-Hak Cho, Won-Seok Chang, Kyoung-Hyun Whang " Surface ripple changes during Cr film ablation with a double ultrashort laser pulse" Optics and Lasers in Engineering, 46, 306-310 (2008) (I.F.: 0.980)

23. Kwang Ryul Kim, Namhyun Kang, Sung-Hak Cho, and Kwang Ho Kim "Plume formation during laser heating of a solid surface", Journal of Computational and Theoretical Nanoscience, 5, 1-5 (2008)

24. Sung-Hak Cho, Won-Seok Chang, Jae-Goo Kim, Kwang Ryul Kim, and Jong Wook Hong" Fabrication of internal diffraction gratings in planar fluoride glass using low-density plasma formation induced by a femtosecond laser"Applied Surface Science 255, 2069-2074 (2008) (I.F.: 1.600)

25. Sung-Hak Cho, Won-Seok Chang, Kwang Ryul Kim, and Jong Wook Hong "Dynamics of plasma formation and permanent structural transformation in ZBLAN excited by tightly focused femtosecond laser pulses" Optics and Lasers in Engineering , 47, 127-132 (2009)(I.F.: 0.980)

26. Sung-Hak Cho, Jung-Kyu Park, Won-Seok Chang, Kwang Ryul Kim, and Jong Wook Hong "Optical diffraction gratings embedded in BK-7 glass by low-density plasma formation using a femtosecond laser"Submitted to Optical Materials (2008) (I.F.: 1.700)

27. Jin Seng Gwag, Masahito Oh-e, Kwang-Ryoul Kim, Sung-Hak Cho, Makoto Yoneya, Hiroshi Yokoyama, Hiroyuki Satou, and Setsuo Itami "A functionally separated nanoimprinting material tailored for homeotropic liquid crystal alignment" Nanotechnology ,19, (2008) 395301 (I.F.: 3.300)

28. Sung-Hak Cho, Won-Seok Chang, Kwang Ryul Kim “Optical diffraction gratings embedded in BK-7 glasses by tightly focused femtosecond laser” submitted to in Optics and Lasers in Engineering (2008) (I.F.: 0.980)

29. Sung-Hak Cho, Won-Seok Chang, Kwang Ryul Kim, and Jong Wook Hong " Measurement of UV absorption of single living cell for cell manipulation using NIR femtosecond laser" Applied Surface Science, 255, 4974-4978 (2009) (I.F.: 1.600)

30. Sung-Hak Cho, Jung-Kyu Park, Won-Seok Chang, Kwang Ryul Kim, and Jong Wook Hong "Femtosecond laser embedded grating micromachining of flexible PDMS plates" Optics Communications, 282, 1317-1321 (2009) (I.F.: 1.400)

31. Kwang Ryul Kim, Jun-Shin Yi, Sung-Hak Cho, Nam-Hyun Kang, Myong-Woo Cho, Bo-Sung Shin, and Byoungdeog Choi "SLM-based Maskless Lithography for TFT-LCD" Applied Surface Science, 255, 18, 7835-7840 (2009) (I.F.: 1.410)

32. Kwang Ryul Kim, Byoungdeog Choi, Sung-Hak Cho " Laser micromachining of CNT/Fe/Al2O3 nanocomposites" Transactions of Nonferrous Metals, 189-193 (2009)

33. Sung-Hak Cho, Jung-Kyu Park, "Internal refractive index modification in PDMS film using a femtosecond laser" in press Transactions of Nonferrous Metals (2010)

34. Sung-Hak Cho, Jung-Kyu Park, "Fabrication of flexible embedded gratings in PDMS film using femtosecond laser irradiation" in press, Applied Surface Science (2010)

35. Sung-Hak Cho, Jung-Kyu Park, Won-Seok Chang "Removal of nano particles on silicon wafer by self-channeled plasma filament" in press, Applied Physics Letter (2010)

36,
Jae-Goo Kim, Sung-Hak Cho, Tae-Jin Je, Doo-Sun Choi, Kyoung-Hyun Whang "Surface pattern formation on Cr thin film with ultrafast laser pulse" Applied Physics A 101, 345-348 (2010)

37. Jung-Kyu Park, Sung-Hak Cho "Optical diffraction gratings embedded in BK-7 glass by low-density plasma formation using a femtosecond laser" Transactions of Nonferrous Metals, 165-169 (2011) (I.F.: 0.70)

38. Kwang-Ruel Kim, Han-Wook jung, Kwog-Su Lee, Jun-sin Lee, Jae-chun You, Myung-Woo Cho, Sung-Hak Cho, Beong-Doc Choi "Rapid laser fabrication of microlens array using colorless liquid photopolymer for AMOLED devices" Optics Communications, 284, 405-410 (2011) (I.F.: 1.530)

39. Jung-Kyu Park, Sung-Hak Cho"Flexible gratings fabricated in polymeric film using femtosecond laser irradiation"Optics and Lasers in Engineering 49, 589-593 (2011)(I.F.: 1.710)

40. Jae-Young Hu, Sung-Hak Cho,Namhyun Kang, Tae-Jin Je, Hyung-Woo Lee, and Kwang Ho Kim "Effects of honing treatment on AIP-TiN and TiA coated end-mill for high speed machining" Transactions of Nonferrous Metals, 83-87 (2011) (I.F.: 0.70)

41. Jung-Kyu Park, Ji-Wook Yoon, Sung-Hak Cho "Vibration assisted femtosecond laser machining on metal" Optics and Lasers in Engineering 50, 833-837 (2012) (I.F.: 1.8)

42. Jung-Kyu Park, Ji-Wook Yoon, Sung-Hak Cho "Removal of nano particles on silicon wafer using the plasma shockwaves excited by a femtosecond laser" Applied Surface Science. 258, 6379-6383 (2012) (I.F.: 1.8)

43. Jung-Kyu Park, Ji-Wook Yoon, Sung-Hak Cho "Removal of nanoparticles on silicon wafer by self-channeled plasma filament" Appl. Phys. A. 108, 269-274 (2012) (I.F.: 2.0)

44. Jung-Kyu Park, Ji-Wook Yoon, Myeong-Chang Gang, Sung-Hak Cho “Surface effects of hybrid vibration-assisted femtosecond laser system for micro-hole drilling of copper substrate” Transactions of Nonferrous Metals, 1003-6326 (2013-01-01) (I.F.: 0.70)

45. Ji-Wook Yoon, Jung-Kyu Park, Gwan-Ho Kim, Myeong-Chang Gang, Sung-Hak ChoInternal modification in transparent hybrid germanium-silica plates using plasma formation induced by a femtosecond laser” Transactions of Nonferrous Metals, 1003-6326 (2013-01-01) (I.F.: 0.70)

46. Ji-Wook Yoon, Hye-Mi So, Sung-Hak CHO, Won Seok Chang "Effect of Polarization of Ultrafast Laser Irradiation on Carbon Nanotube Film" Thin Solid Films 546,69-72 (2013) (I.F.: 1.70)

47. Jae-Goo Kim, Tae-Jin Je, Sung-Hak Cho, Eun-Chae Jeon, Kyoung-Hyun Whang "Micro-cutting with diamond tool micro-patterned by femtosecond laser" International Journal of Precision Engineering and Manufacturing, 15, 1081-1085 (2014)

48. Ji-Wook Yoon, Won Seok Chang, and Sung-Hak Cho, “Laser direct patterning of AgNW/CNT hybrid films” Optics and Lasers in Engineering, 73, 40-45 (2015)

49. Kwang-Ruel Kim, Hyun-Jin Kim, Hyun-Il Choi, Keong-Sub Shin, Sung-Hak Cho, Beong-Doc Choi "Ultrafast laser microfabrication of a trapping device for colorectral cancer cells" Microelectronics Engineering, 140, 1-5 (2015)

50. J. Y. Lee, M. C. Kang, K.H. Kim, W. I. Park, Sung-Hak Cho "Effects of optical absorbance with ablation characteristics in femtosecond laser irradiation of carbon reinforced Al2O3 composites" Advances in Applied Ceramics, Online Published (2015)

51. Kwang-Ryul Kim, Jae-Hee Cho, Na-Young Lee, Hyun-Jin Kim, Sung-Hak Cho,Hong-Jin Park, Byoungdeog Choi "High-precision and ultrafast UV laser system for next-generationflexible PCB drilling" Journal of Manufacturing Systems 38, 107-113 (2016)

52. Hoon-Young KIM, Ji-Wook Yoon, Won-Seok Choi, and Sung-Hak Cho "Ablation depth control with 40 nm resolution on ITO thin film using a square, flat-top beam shaped femtosecond laser” Optics and Lasers in Engineering, 84, 44-50 (2016)

53. Jaegu Kim, Jae-Hyun Kim, Sung-Hak Cho, and Kyung-Hyun Whang " Selective lift-off of GaN light-emitting diode from a sapphire substrate using 266-nm diode-pumped solid-state laser irradiation" Appl. Phys. A 122 : 305 (2016)

54. Hoon-Young Kim, Ji-Wook Yoon, Won-Suk Choi, Kwang-Ryul Kim, Sung-Hak Cho "Ablation depth control with 40nm resolution on ITO thin films using a square, flat top beam shaped femtosecond NIR laser" Optics and Lasers in Engineering, 84, 44 (2016)

55. Wonsuk Choi, Hoon Young Kim, Jin Woo Jeon, Won Seok Chang, Sung-Hak Cho "Vibration-Assisted Femtosecond Laser Drilling with Controllable Taper Angles for AMOLED Fine Metal Mask Fabrication" Materials, 10, 212 (2017)

56. Sanghoon Ahn, Jiyeon Choi, Jiwhan Noh, Sung-Hak Cho "High aspect ratio nanoholes in glass generated by femtosecond laser pulses with picosecond intervals" Optics and Lasers in Engineering, 101, 85 - 88 (2018)

57. Jin-Woo Jeon, Suk-Young Ji, Hoon-Young Kim, Wonsuk Choi, Young-Gwan, Shin, Sung-Hak Cho "Formation of Permanent Brown-colored Patterns in Transparent BK7 Glass upon Irradiation with a Tightly Focused Femtosecond Laser" Research & Reviews: Journal of Material Sciences, 6, 1 (2018)

58. Jin-Woo Jeon, Sangwoo Yoon, Hae Woon Choi, Joohan Kim, Dave Farson, Sung-Hak Cho "The Effect of Laser Pulse Widths on Laser-Ag Nanoparticle Interaction: Femto- to Nanosecond Lasers" Applied Sciences, 8, 112 (2018)

59. Seok Young Ji, Wonsuk Choi, Hoon-Young Kim, Jin-Woo Jeon, Sung-Hak Cho, Won Seok Chang "Fully Solution-Processable Fabrication of Multi-Layered Circuits on a Flexible Substrate Using Laser Processing" Materials, 11, 268 (2018)

60. Hoon-Young Kim, Won-Suk Choi, Suk-Young Ji, Young-Gwan Shin, Jin-Woo Jeon, Sanghoon Ahn, Sung-Hak Cho "Morphologies of femtosecond laser ablation of ITO thin films using Gaussian or quasi-flat top beams for OLED repair" Applied Physics A, 457, 123 (2018)

61. Hoon-Young Kim, Jin-Woo Jeon, Wonsuk Choi, Young-Gwan Shin, Suk-Young Ji, Sung-Hak Cho "Ridge minimization of ablated morphologies on ITO thin films using squared quasi-flat top beam" Materials, 11, 530 (2018)

62. Wonsuk Choi, Dongshi Zhang, Jurij Jakobi, Mark-Robert Kalus, Stephan Barcikowski, Sung-Hak Cho, Koji Sugioka “Spontaneous Shape Alteration and Size Separation of Surfactant-Free Silver Particles Synthesized by Laser Ablation in Acetone during Long-Period Storage” nanomaterials 8, 529 (2018)

63. Wonsuk Choi, Dongshi Zhang, Yugo Oshima, Ulf Wiedwald, Sung-Hak Cho, Hsiu-Pen Lin, Yaw Kuen Li, Yoshihiro Ito, Koji Sugioka, "Magnetic Fe@FeOx, Fe@C and α-Fe2O3 Single-Crystal Nanoblends Synthesized by Femtosecond Laser Ablation of Fe in Acetone" nanomaterials, 11, 268 (2018)

64. Wonsuk Choi, Dongshi Zhang, Kenjiro Yazawa, Keiji Numata, Ayaka Tateishi, Sung-Hak Cho, Hsiu-Pen Lin, Yaw Kuen Li, Yoshihiro Ito, and Koji Sugioka, “Two Birds with One Stone: Spontaneous Size Separation and Growth Inhibition of Femtosecond Laser-Generated Surfactant-Free Metallic Nanoparticles via ex Situ SU-8 Functionalization” ACS Omega, 3, 10953 (2018)