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Title: Lasing from dye-doped photonic crystals with graded layers in dichromate gelatin emulsions
Authors: Kok, Man Hin
Lu, Weixin
Lee, Jeffrey Chi Wai
Tam, Wing-Yim
Wong, George K. L.
Chan, Che-Ting
Keywords: Dye lasers
Finite difference time-domain analysis
Holographic interferometry
Laser modes
Optical pumping
Photonic band gap
Photonic crystals
Issue Date: Apr-2008
Citation: Applied physics letters, v. 92, 151108 (2008)
Abstract: We report on optically pumped lasing from dye-doped, graded-spacing layer structures of dichromate gelatin emulsions fabricated using two-beam holographic interference. The graded layers exhibited deep and wide photonic band gaps. Multimode lasing with both a low threshold and a high quality factor was observed at the band edge of the photonic band gap. We modeled the emissions from the dye-doped graded layer system using a finite difference time domain technique and achieved good agreement with experimental results.
Rights: Applied Physics Letters © copyright (2008) American Institute of Physics. The Journal's web site is located at
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