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Polymer waveguide grating couplers for low cost nanoimprinted integrated optics

Polymer waveguide grating couplers for low cost nanoimprinted integrated optics
Polymer waveguide grating couplers for low cost nanoimprinted integrated optics
Waveguide grating couplers permit efficient coupling to planar waveguides, complete with relaxed alignment tolerances and the possibility of wafer scale device testing without cleaving. To date, most solutions have been implemented as 1D gratings in high index contrast waveguides (typically SOI) with high coupling strengths and lateral mode converters. Here, we report the design and optimization of 1D grating couplers in polymer waveguides with much lower index cores (n = 1.8). Basic parameters from grating theory are used as the basis for FDTD simulations scanning over etch depth and grating period. Several optimizations are tested, including top claddings, buried dielectric mirrors, and buried metal mirrors. More than 80% coupling efficiency to air is predicted for a uniform symmetric grating, 20 periods long, with a carefully positioned buried metal reflector. The designs are intended for monolithic integration in polymeric planar lightwave circuits mass-produced by a roll-to-roll nanoimprint lithography process, where metallic mirrors can be safely and successfully incorporated.
Pollard, M.
172acf2b-a2d9-4efb-a3d5-bc3c56b50e89
Pearce, S.
54891fdd-25ca-4768-ab4d-27f51be1e3e9
Chen, R.
08f4fdc2-6244-48e5-a642-cb9e2641531c
Oo, Swe Zin
6495f6da-8f17-4484-98fb-6151b4efbd9a
Charlton, M.D.B
fcf86ab0-8f34-411a-b576-4f684e51e274
Pollard, M.
172acf2b-a2d9-4efb-a3d5-bc3c56b50e89
Pearce, S.
54891fdd-25ca-4768-ab4d-27f51be1e3e9
Chen, R.
08f4fdc2-6244-48e5-a642-cb9e2641531c
Oo, Swe Zin
6495f6da-8f17-4484-98fb-6151b4efbd9a
Charlton, M.D.B
fcf86ab0-8f34-411a-b576-4f684e51e274

Pollard, M., Pearce, S., Chen, R., Oo, Swe Zin and Charlton, M.D.B (2012) Polymer waveguide grating couplers for low cost nanoimprinted integrated optics. Photonics West 2012, San Francisco, United States. 21 - 26 Jan 2012. (doi:10.1117/12.908096).

Record type: Conference or Workshop Item (Poster)

Abstract

Waveguide grating couplers permit efficient coupling to planar waveguides, complete with relaxed alignment tolerances and the possibility of wafer scale device testing without cleaving. To date, most solutions have been implemented as 1D gratings in high index contrast waveguides (typically SOI) with high coupling strengths and lateral mode converters. Here, we report the design and optimization of 1D grating couplers in polymer waveguides with much lower index cores (n = 1.8). Basic parameters from grating theory are used as the basis for FDTD simulations scanning over etch depth and grating period. Several optimizations are tested, including top claddings, buried dielectric mirrors, and buried metal mirrors. More than 80% coupling efficiency to air is predicted for a uniform symmetric grating, 20 periods long, with a carefully positioned buried metal reflector. The designs are intended for monolithic integration in polymeric planar lightwave circuits mass-produced by a roll-to-roll nanoimprint lithography process, where metallic mirrors can be safely and successfully incorporated.

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More information

Published date: 9 February 2012
Venue - Dates: Photonics West 2012, San Francisco, United States, 2012-01-21 - 2012-01-26
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 350328
URI: https://eprints.soton.ac.uk/id/eprint/350328
PURE UUID: b79d3a98-bb2e-44dd-ad59-6b724cf106b4

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Date deposited: 26 Mar 2013 14:50
Last modified: 27 Feb 2019 17:31

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Contributors

Author: M. Pollard
Author: S. Pearce
Author: R. Chen
Author: Swe Zin Oo
Author: M.D.B Charlton

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