Dielectric-Band Photonic Crystal Nanobeam Lasers

We investigate a mode gap confined dielectric band laser via a 1-D photonic crystal (PhC) nanobeam (NB) nanocavity with lattice gradually shifted PhC mirror. Owing to different modal symmetries, different zeroth-order dielectric mode properties, including quality ( Q ) factors, mode volumes, lasing...

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Bibliographic Details
Published in:Journal of lightwave technology 2013-01, Vol.31 (1), p.36-42
Main Authors: LEE, Po-Tsung, LU, Tsan-Wen, CHIU, Li-Hsun
Format: Article
Language:English
Subjects:
Bonding
Cavity resonators
Dielectrics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lasers
Lattices
Mirrors
nanobeam (NB)
nanocavity
Niobium
Optical materials
Optics
Photonic bandgap materials
Photonic crystal (PhC)
Physics
semiconductor laser
Semiconductor lasers
laser diodes
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Summary:We investigate a mode gap confined dielectric band laser via a 1-D photonic crystal (PhC) nanobeam (NB) nanocavity with lattice gradually shifted PhC mirror. Owing to different modal symmetries, different zeroth-order dielectric mode properties, including quality ( Q ) factors, mode volumes, lasing thresholds, and slope efficiencies, in nanocavities with two different cavity sizes are investigated. In experiments, single-mode lasing from dielectric bands with low effective lasing thresholds is obtained. Rising of the high-order modes is also observed when we increase the PhC mirror periods for high Q factor of the zeroth-order dielectric mode. In addition, we observe the bonding and antibonding modes in beamwidth mismatched coupled NB nanocavities and switch the dominant lasing mode via spatially nonuniform carrier injection.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2012.2229695