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Abstract: The design of highly wavelength tunable semiconductor laser structures ispresented. The system is based on a one dimensional photonic crystal cavityconsisting of two patterned, doubly-clamped nanobeams, otherwise known as a-zipper- cavity. Zipper cavities are highly dispersive with respect to the gapbetween nanobeams in which extremely strong radiation pressure forces exist.Schemes for controlling the zipper cavity wavelength both optically andelectrically are presented. Tuning ranges as high as 75nm are achieved for anominal design wavelength of 1.3micron. Sensitivity of the mechanicallycompliant laser structure to thermal noise is considered, and it is found thatdynamic back-action of radiation pressure in the form of an optical orelectrical spring can be used to stabilize the laser frequency. Fabrication ofzipper cavity laser structures in GaAs material with embedded self-assembledInAs quantum dots is presented, along with measurements of photoluminescencespectroscopy of the zipper cavity modes.



Author: Thiago P. Mayer Alegre, Raviv Perahia, Oskar Painter

Source: https://arxiv.org/



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