Physics – Optics
Scientific paper
2009-12-22
Optics Express, Vol. 18, Issue 8, pp. 7872-7885 (2010)
Physics
Optics
20 pages, 8 figures
Scientific paper
10.1364/OE.18.007872
The design of highly wavelength tunable semiconductor laser structures is presented. The system is based on a one dimensional photonic crystal cavity consisting of two patterned, doubly-clamped nanobeams, otherwise known as a "zipper" cavity. Zipper cavities are highly dispersive with respect to the gap between nanobeams in which extremely strong radiation pressure forces exist. Schemes for controlling the zipper cavity wavelength both optically and electrically are presented. Tuning ranges as high as 75nm are achieved for a nominal design wavelength of 1.3micron. Sensitivity of the mechanically compliant laser structure to thermal noise is considered, and it is found that dynamic back-action of radiation pressure in the form of an optical or electrical spring can be used to stabilize the laser frequency. Fabrication of zipper cavity laser structures in GaAs material with embedded self-assembled InAs quantum dots is presented, along with measurements of photoluminescence spectroscopy of the zipper cavity modes.
Mayer Alegre Thiago P.
Painter Oskar
Perahia Raviv
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