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Authors: J. Van Campenhout, P. Bienstman, R. Baets
Title: Band-Edge Lasing in Gold-Clad Photonic-Crystal Membranes
Format: International Journal
Publication date: 7/2005
Journal/Conference/Book: IEEE Journal on Selected Areas in Communications
Editor/Publisher: IEEE, 
Volume(Issue): 23(7) p.1418-1423
Internal Reference: [N-403]
Download: Download this Publication (490KB) (490KB)

Abstract

We investigate the possibility to achieve band-edge
lasing in optically thick gold-clad photonic-crystal membranes,
with a dielectric thickness of around 1 µm. We have performed
a two-dimensional eigenmode-expansion analysis of bandedge
resonators in one-dimensional photonic crystals. Material
thresholds, quality factors and emission efficiencies have been
calculated for TE band-edge laser resonances on the second and
third Gamma-point. The second Gamma-point sustains band-edge laser modes
with quality factors above 2500 for a membrane thickness of
1 µm and a cavity length of 20 periods, however with a very
poor surface-emission efficiency. Band-edge laser modes located
on the third Gamma-point have lower quality factors but higher surfaceemission
efficiencies. In both cases, the photonic crystal should
be designed specifically to avoid coupling with lossy, higher order
modes.

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