Title | A reversibly tunable photonic crystal nanocavity laser using photochromic thin film |
Publication Type | Journal Article |
Year of Publication | 2011 |
Authors | D. Sridharan, R. Bose, H. Kim, G. S. Solomon, and E. Waks |
Journal | Optics Express |
Volume | 19 |
Pagination | 5551 |
Date Published | mar |
ISSN | 1094-4087 |
Keywords | 2011, CMAMO, Lasers, Multiple Fellows, Nanophotonics and photonic crystals, tunable |
Abstract | We demonstrate a reversibly tunable photonic crystal quantum dot laser using a photochromic thin film. The laser is composed of a photonic crystal cavity with a bare cavity Q as high as 4500 coupled to a high density ensemble of indium arsenide quantum dots. By depositing a thin layer of photochromic material on the photonic crystal cavities, the laser can be optically tuned smoothly and reversibly over a wavelength range of 2.68 nm. Lasing is observed at temperatures as high as 80 K in the 900-1000 nm near-infrared wavelength range. The spontaneous emission coupling factor is measured to be as high as $\beta$ = 0.41, indicating that the laser operates in the high-$\beta$ regime. |
URL | http://www.opticsexpress.org/abstract.cfm?URI=oe-19-6-5551 |