Wavelength and intensity switching in directly coupled semiconductor microdisk lasers

We demonstrate output wavelength and intensity switching in a three-element directly coupled microdisk device consisting of one spiral microdisk coupled to two semicircle microdisks. The gapless coupling mechanism used allows individual elements to achieve lasing while achieving optimal transfer of...

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Bibliographic Details
Published in:Optics letters 2008-03, Vol.33 (6), p.605-607
Main Authors: FERNANDES, Gustavo E, GUYOT, Laurent, CHERN, Grace D, KNEISSL, Michael, JOHNSON, Noble M, QINGHAI SONG, LEI XU, CHANG, Richard K
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lasers
Microcavity and microdisk lasers
Optics
Physics
Semiconductor lasers
laser diodes
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Summary:We demonstrate output wavelength and intensity switching in a three-element directly coupled microdisk device consisting of one spiral microdisk coupled to two semicircle microdisks. The gapless coupling mechanism used allows individual elements to achieve lasing while achieving optimal transfer of optical power between adjacent microdisks. By controlling the transparency of the center element via injection current, the edge elements can be allowed to exchange their amplified spontaneous emission. In this manner, on-off-on switching of the output intensity, as well as discontinuous shifts in the output wavelength, can be achieved as a function of increasing injection current.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.33.000605