A high-reflectivity high-Q micromechanical Bragg-mirror

Details A high-reflectivity high-Q micromechanical Bragg-mirror A high-reflectivity high-Q micromechanical Bragg-mirror

2006-07-28

arxiv.org/abs/cond-mat/0607771v2

Appl. Phys. Lett. 89, 223101 (2006)

Physics

Condensed Matter

Materials Science

3 pages, 2 figures

Scientific paper

10.1063/1.2393000

We report on the fabrication and characterization of a micromechanical oscillator consisting only of a free-standing dielectric Bragg mirror with high optical reflectivity and high mechanical quality. The fabrication technique is a hybrid approach involving laser ablation and dry etching. The mirror has a reflectivity of 99.6%, a mass of 400ng, and a mechanical quality factor Q of approximately 10^4. Using this micromirror in a Fabry Perot cavity, a finesse of 500 has been achieved. This is an important step towards designing tunable high-Q high-finesse cavities on chip.

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