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Grating-assisted coupling to nanophotonic circuits in microcrystalline diamond thin films

: Rath, P.; Khasminskaya, S.; Nebel, C.E.; Wild, C.; Pernice, W.H.P.

Fulltext urn:nbn:de:0011-n-2414231 (1.1 MByte PDF)
MD5 Fingerprint: 11add35ac8487e60c880aedd080b568c
Created on: 16.5.2013

Beilstein Journal of Nanotechnology 4 (2013), pp.300-305
ISSN: 2190-4286
Journal Article, Electronic Publication
Fraunhofer IAF ()
diamond devices; integrated optics; waveguiding circuit

Synthetic diamond films can be prepared on a waferscale by using chemical vapour deposition (CVD) on suitable substrates such as silicon or silicon dioxide. While such films find a wealth of applications in thermal management, in X-ray and terahertz window design, and in gyrotron tubes and microwave transmission lines, their use for nanoscale optical components remains largely unexplored. Here we demonstrate that CVD diamond provides a high-quality template for realizing nanophotonic integrated optical circuits. Using efficient grating coupling devices prepared from partially etched diamond thin films, we investigate millimetre-sized optical circuits and achieve single-mode waveguiding at telecoms wavelengths. Our results pave the way towards broadband optical applications for sensing in harsh environments and visible photonic devices.