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Title: Lasing threshold control in two-dimensional photonic crystals with gain

We demonstrate how the lasing threshold of a two dimensional photonic crystal containing a four-level gain medium is modified, as a result of the interplay between the group velocity and the modal reflectivity at the interface between the cavity and the exterior. Depending on their relative strength and the optical density of states, we show how the lasing threshold may be dramatically altered inside a band or, most importantly, close to the band edge. The idea is realized via self-consistent calculations based on a finite-difference time-domain method. The simulations are in good agreement with theoretical predictions.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2]
  1. Institute of Electronic Structure and Laser, FORTH
  2. Ames Laboratory
Publication Date:
OSTI Identifier:
1166778
Report Number(s):
IS-J 8462
Journal ID: ISSN 1094-4087; OPEXFF
DOE Contract Number:
DE-AC02-07CH11358
Resource Type:
Journal Article
Resource Relation:
Journal Name: Optics Express; Journal Volume: 22; Journal Issue: 16
Publisher:
The Optical Society
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE