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Low-threshold lasing in photonic-crystal heterostructures

DSpace at IIT Bombay

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Title Low-threshold lasing in photonic-crystal heterostructures
 
Creator REDDY, MS
VIJAYA, R
RUKHLENKO, ID
PREMARATNE, M
 
Subject VELOCITY ANOMALY PECULIAR
SPONTANEOUS EMISSION
GAIN-ENHANCEMENT
LASERS
TRANSMISSION
CAVITY
BANDS
 
Description We study a photonic crystal (PhC) heterostructure cavity consisting of gain medium in a three-dimensional (3D) PhC sandwiched between two identical passive multilayers. For this structure, based on Korringa-Kohn-Rostoker method, we observe a decrease in the lasing threshold of two orders of magnitude, as compared with a stand-alone 3D PhC. We attribute this remarkable decrease in threshold gain to the overlap of the defect cavity mode with the reduced group velocity region of the PhC's dispersion, and the associated enhancement in the distributed feedback from the ordered layers of the PhC. The obtained results show the potency for designing PhC-based, compact on-chip lasers with ultra-low thresholds. (C) 2014 Optical Society of America
 
Publisher OPTICAL SOC AMER
 
Date 2014-12-29T06:27:16Z
2014-12-29T06:27:16Z
2014
 
Type Article
 
Identifier OPTICS EXPRESS, 22(6)6229-6238
1094-4087
http://dx.doi.org/10.1364/OE.22.006229
http://dspace.library.iitb.ac.in/jspui/handle/100/17308
 
Language English