Theoretical Optics Group

Ray-Kuang Lee's group

National Tsing Hua University, Taiwan

Update: May 15, 2009



Currently we are focusing at

  • the duality of wave and particle
  • the correspondings between classical and quantum mechanics
  • light harvesting in molecular and bio systems

with topics in

  • Nonlinear Optics:
    - Nonlocal solitons and vortex,
    - Nonlinear photonic crystals,
    - Dipolar Bose-Einstein condensates,
    - Cavity solitons and scar modes in VCSELs, with T.D. Lee (NYUST) in Exp.
    - MI, TI, and chaotic patterns, with C.J. Cheng (NCHU) in Exp.
    - Slow lights, with Exp. in I. Yu (NTHU) and J. Chi (ITRI) in Exp.
  • Quantum Optics:
    - Quantum soliton squeezing,
    - Quantum phase transition of light,
    - Quantum mechanics in phase space,
    - Quantum memory,
    - Quantum optics in Comb lasers, with W.Y. Cheng (Sinica) in Exp.

Recent selected research highlights:

Cavity solitons in VCSELs YuanYao Lin, Wun-Jhang Lin, Han-Zhong Liao, Jin-Shan Pan, Tsin-Dong Lee, Ray-Kuang Lee, "Observations of Cavity Dipole Solitons and Vortex Soliton Clusters in VCSELs with a Surface Photonic Crystal Structure," CLEO/QELS, QTuC5, San Jose, California, USA (2008).
Directional lasing

Yuan Yao Lin, Chih-Yao Chen, Wei Chien, Jin-Shan Pan, Tsin-Dong Lee, and Ray-Kuang Lee, "Enhanced directional lasing by the interference between stable and unstable periodic orbits,"

Appl. Phys. Lett. 94, 221112 (2009). [download]

Chaotic modes in VCSELs

Tsin-Dong Lee, Chih-Yao Chen, YuanYao Lin, Ming-Chiu Chou, Te-ho Wu, and Ray-Kuang Lee, "Surface-structure-assisted chaotic mode lasing in vertical cavity surface emission lasers,"

Phys. Rev. Lett. 101, 084101 (2008). [download]

Elliptical solitons

YuanYao Lin and Ray-Kuang Lee, "Symmetric-breaking instabilities of generalized elliptical solitons,"

Opt. Lett. 33, 1377 (2008). [download]

Slow solitons

Wen-Xing Yang and Ray-Kuang Lee,"Slow optical solitons via intersubband transitions in a semiconductor quantum well,"

Euro. Phys. Lett. 83, 14002 (2008). [download]

Ultraslow solitons in quantum wells

Wen-Xing Yang, Jing-Min Hou,and Ray-Kuang Lee, "Ultraslow bright and dark solitons in semiconductor quantum wells,"

Phys. Rev. A 77, 033838 (2008). [download]

Optimal detection for entangled solitons

Yinchieh Lai and Ray-Kuang Lee, "Entangled quantum nonlinear Schrodinger solitons,"

Phys. Rev. Lett. (accepted, June 2009).

Quantum phase transitions of light for N two-level atoms

Soi-Chan Lei and Ray-Kuang Lee, "Quantum Phase Transitions of Light in the Dicke-Bose-Hubbard model,"

Phys. Rev. A 77, 033827 (2008). [download]




Research interests:

Nonlinear System:

Solitons and Vortex,

Bose-Einstein condensates,

Quantum billiards,

Optical pattern foramtion,

Slow lights,


Device Simulation:

Fiber Bragg grating synthesis,



Brief reprot 2008


Brief reprot 2007