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arXiv · 1312.4371

Diamond Integrated Optomechanical Circuits

Patrik Rath·Svetlana Khasminskaya·Christoph Nebel·Christoph Wild·Wolfram H. P. Pernice
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Abstract

Diamond offers unique material advantages for the realization of micro- and nanomechanical resonators due to its high Young's modulus, compatibility with harsh environments and superior thermal properties. At the same time, the wide electronic bandgap of 5.45eV makes diamond a suitable material for integrated optics because of broadband transparency and the absence of free-carrier absorption commonly encountered in silicon photonics. Here we take advantage of both to engineer full-scale optomechanical circuits in diamond thin films. We show that polycrystalline diamond films fabricated by chemical vapour deposition provide a convenient waferscale substrate for the realization of high quality nanophotonic devices. Using free-standing nanomechanical resonators embedded in on-chip Mach-Zehnder interferometers, we demonstrate efficient optomechanical transduction via gradient optical forces. Fabricated diamond resonators reproducibly show high mechanical quality factors up to 11,200. Our low cost, wideband, carrier-free photonic circuits hold promise for all-optical sensing and optomechanical signal processing at ultra-high frequencies.

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Patrik Rath, Svetlana Khasminskaya, Christoph Nebel, Christoph Wild, Wolfram H. P. Pernice. 2013-12-16. Diamond Integrated Optomechanical Circuits. https://doi.org/10.1038/ncomms2710

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