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ID 113926
Author
Kumagai, Naoto National Institute of Advanced Industrial Science and Technology KAKEN Search Researchers
Content Type
Journal Article
Description
Room-temperature two-color lasing was demonstrated by current injection into a GaAs/AlGaAs coupled multilayer cavity for terahertz emitting devices utilizing its difference-frequency generation (DFG) inside the structure. We prepared two epitaxial wafers with (001) and (113)B orientations and they were directly bonded to form the coupled multilayer cavity. The (001) side cavity contains two types of InGaAs multiple quantum wells to realize optical gain for two-color lasing while a single GaAs layer of the (113)B side cavity is a nonlinear medium for efficient DFG. Lasing behavior was clearly observed for two modes under pulsed current conditions at room temperature. We found that intensity relation between two-color lasing was dependent on the pulse duration due to the different temporal profiles of emission intensity. Simultaneous two-color lasing in the device was also confirmed by measuring the sum-frequency generation signal using a beta barium borate crystal.
Journal Title
Japanese Journal of Applied Physics
ISSN
13474065
00214922
NCID
AA12295836
Publisher
The Japan Society of Applied Physics
Volume
57
Issue
4S
Start Page
04FH03
Published Date
2018-03-01
Rights
© 2018 The Japan Society of Applied Physics
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Author
departments
Science and Technology