Dielectric-band photonic crystal nanobeam lasers

Po Tsung Lee*, Tsan Wen Lu, Li Hsun Chiu

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

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.

Original languageEnglish
Article number6361416
Pages (from-to)36-42
Number of pages7
JournalJournal of Lightwave Technology
Volume31
Issue number1
DOIs
StatePublished - 7 Jan 2013

Keywords

  • Photonic crystal (PhC)
  • nanobeam (NB)
  • nanocavity
  • semiconductor laser

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