Two-dimensional square lattice photonic band gap single cell laser

Han Youl Ryu, Se Heon Kim, Hong Gyu Park, Yong Hee Lee

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Novel square lattice photonic band gap lasers are realized at room temperature from single cell photonic crystal slab micro-cavities fabricated in InGaAsP materials emitting at 1.5 μm. This single cell photonic band gap laser operates in the new class of two-dimensional mode to be classified as the smallest possible whispering gallery mode with genuine energy null at the center. The low-loss nondegenerate mode with modal volume of 0.1 (λ/2)3 demonstrates a spectrometer-limited below-threshold quality factor > 2000 and a theoretical quality factor of > 10000. Threshold incident peak pump power of 0.8 mW is achieved from this whispering-gallery-type laser mode. The other class of photonic crystal lasers is also observed outside the photonic band gap of the square lattice, operating in the mode characteristically one-dimensional.

Original languageEnglish
Pages (from-to)173-180
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2002 Apr 25
Externally publishedYes
EventPhotonic Bandgap Materials and Devices 2002 - San Jose, United States
Duration: 2002 Jan 192002 Jan 25

Bibliographical note

Funding Information:
This work was supported by the National Research Laboratory Project of Korea.


  • InGaAsP
  • Micro-cavity
  • Photonic band gap
  • Photonic crystal laser
  • Single defect
  • Whispering gallery mode

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Two-dimensional square lattice photonic band gap single cell laser'. Together they form a unique fingerprint.

Cite this