Title :
Tradeoffs between threshold and directionality in microdisk laser design
Author :
Nosich, Alexander I. ; Smotrova, Elena I. ; Boriskina, Svetlana V. ; Benson, Trevor M. ; Sewell, Phillip
Author_Institution :
IRE NASU, Kharkov, Ukraine
Abstract :
A reasonable tradeoff between low threshold and high directionality of light emission is one of the main goals in the design of semiconductor microcavity lasers. Here, smoothing of the disk rim and pumping only a ring-shaped area lower the threshold power, however, neither has an effect on the directionality. Departure from a circular shape improves directionality however usually spoils the thresholds and the same occurs when loading microdisks with optical fibers or building photonic molecules from microdisk "photonic atoms". A search for configurations, which are provide both lower thresholds and better directionalities of the lasing modes, calls for detailed cold-cavity simulations with accurate numerical techniques.
Keywords :
laser beams; microcavity lasers; microdisc lasers; numerical analysis; optical fibres; optical pumping; ring lasers; semiconductor lasers; cold-cavity simulation; lasing modes; light emission; microdisk photonic atoms; optical fibers; photonic molecules; semiconductor microdisk laser design; threshold power; Atom optics; Fiber lasers; Microcavities; Optical design; Optical fibers; Pump lasers; Ring lasers; Semiconductor lasers; Shape; Smoothing methods;
Conference_Titel :
Advanced Optoelectronics and Lasers, 2005. Proceedings of CAOL 2005. Second International Conference on
Print_ISBN :
0-7803-9130-6
DOI :
10.1109/CAOL.2005.1553807