Namkyoo Park, Ph.D., Professor, EECS, Seoul National University
Address:
Photonic Systems Laboratory, Rm 301-1101, School of EECS, Seoul National University, Seoul, 151-741, Korea
Phone: +82-2-880-1820, Fax: +82-2-885-5284, E-mail: nkpark@snu.ac.kr
Academic background:
1987, B.S. Physics, Seoul National University; 1988, M.S. Physics, Brown University;
1994, Ph.D. Applied Physics (Prof. Kerry K. Vahala), California Institute of Technology
Professional career:
2007-
Professor, School of EECS, Seoul National University, Seoul, Korea
2001-2007
Associate Professor, School of EECS, Seoul National University, Seoul, Korea
1997-2001
Assistant Professor, School of EECS, Seoul National University, Seoul, Korea
1996-1997
Senior Researcher, Samsung Electronics, Seoul, Korea
1994- 1996
Postdoctoral Research Fellow, Bell Laboratories, Murray Hill, NJ, USA
Research area:
Nano Photonic Devices and its Applications to Photonic Information Processing
Representative publications:
1. "24-line multiwavelength operation of erbium-doped fiber-ring laser", Phot. Tech. Lett. 8, 1459 (1996) cited >156 times
2. "Actively Gain Flattened Erbium Doped Amplifier over 35nm by Using All-Fiber Acoustooptic Tunable Filters", Phot. Tech.
Lett. 10, 790 (1998) cited >110 times
3. "Enhancement of Power Conversion Efficiency for an L-Band EDFA with a Secondary Pumping Effect in the Unpumped
EDF Section", Phot. Tech. Lett. 11, 42 (1999) cited >93 times
4. "Efficient Formulation of Raman Amplifier Propagation Equations with Average Power Analysis", Phot. Tech. Lett. 12, 1486
(2000) cited > 82 times
5. "Coded output photonic A/D converter based on photonic crystal slow-light structures", Optics Express. 16, 13752 (2008)
6. "Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit", Nature Photonics. 3, 152 (2009)
7. "Extraordinary magnetic field enhancement with metallic nanowire : Role of surface impedance in Babinet’s principle for sub
skin-depth regime”, Physical Review Letters, 103, 263901 (2009)
Miscellaneous
• 2008 - present
Associate Editor, Optics Express (Plasmonics and Nano-Photonics)
• 2001 - 2009
Associate Editor, Photonics Technology Letters (Optical Amplifier and Transmission)
• 1999 - 2009
Associate Editor, Optical Fiber Technology (Optical Amplifier and Transmission)
• 2006 - 2008
Long Range Planning Committee Member (Publication), IEEE LEOS
• 2003
Young Scientist Award (Presidential)
• Accumulated Total Citation number ~ 1,900 for 90 International Journal Publications
• Principal Investigator, Global Research Laboratories (on Plasmonics, funded by Korean Government)
• Founder, Luxpert Technologies (Yearly Revenue ~ 10MM USD/Yr)
All-Optical Diode
Namkyoo PARK
Photonic Systems Laboratory,
School of EECS, Seoul National University, Seoul, 151-741, Korea
The ultrafast, distortion-free optical communication of today owes its remarkable success to the
untainted linearity of optical materials and devices for various physical arguments. Still at the same time,
the exact same linearity of photonic materials seriously hindered the development of nonlinear photonic
devices or systems. Nonlinearity being the core for the realization of logic devices for digital electronics
today, its counterpart in photonic domain, the photonic logic elements, fully exploiting the Terahertz
bandwidth advantage of photonics is still at its infancy. To keep the promise of ultra-fast all-optical,
possibly as well digital signal processing in nano-photonic integrated circuits, serious efforts are under
way to realize various functional elements [1-12]; such as the all-optical diode in photonic platforms.
Still, for all the past demonstrations on the optical diode, highly costly in operation power (~
10W/μm) and limited in throughput efficiency and directionality, at current stage the optical diode in
reality remains as a topic of pure academic interest.
In this talk, I will show that it is possible to meet all these seemingly contradictory design criteria
for the optical diode, by introducing a tunneling structure employing parity-sensitive excitation of the
resonator pair. Orders of improvement in the operation power (~ 100W/μm), high directionality, and
near unity throughput was achieved with ultra-fast device operation speed well exceeding 100s GHz.
At the end of the talk, recent activities of the Photonics Systems Laboratory will be summarized.
References
1. Mehmet Fatih Yanik, Shanhui Fan, Marin Soljaˇcic, and J. D. Joannopoulos. Opt. Lett. 28,
2506-2508 (2003).
2. Marin Soljaˇcic and J. D. Joannopoulos. Nat. Mater. 3, 211-219 (2004).
3. Daryl M. Beggs, Thomas P. White, Liam O’Faolain, and Thomas F. Krauss. Opt. Lett. 33,
147-149 (2008).
4. Qianfan Xu and Michal Lipson. Opt. Express 15, 924-929 (2007).
5. Zongfu Yu and Shanhui Fan. Nat. Photon. 3, 91-94 (2009).
6. Parisa Andalib and Nosrat Granpayeh. Opt. Express 26, 10-16 (2009).
7. Y. Park, J. Azaña and R. Slavík. Opt. Lett. 32, 710-712 (2007).
8. Ilya Fushman, Edo Waks, Dirk Englund, Nick Stoltz, Pierre Petroff and Jelena Vučković. Appl.
Phys. Lett. 90, 091118 (2007).
9. Katia Gallo, Gaetano Assanto, Krishnan R. Parameswaran and Martin M. Fejer. Appl. Phys.
Lett. 79, 314-316 (2001).
10. Reji Philip, M. Anija, Chandra S. Yelleswarapu and D. V. G. L. N. Rao. Appl. Phys. Lett. 91,
141118, (2007).
11. Xu-Sheng Lin, Jun-Hu Yan, Li-Jun Wu, and Sheng Lan. Opt. Express 16, 20949-20954 (2008).
12. Jisoo Hwang, Myoung Hoon Song, Byoungchoo Park, Suzushi Nishimura, Takehiro Toyooka, J.
W. Wu, Yoichi Takanishi, Ken Ishikawa and Hideo Takezoe. Nature Materials 4, 383-387 (2005).