Sub-dB/cm propagation loss in silver stripe waveguides

Park, Suntak, Ju, Jung Jin, Kim, Jin Tae, Kim, Min-su, Park, Seung Koo, Lee, Jong-Moo, Lee, Wook-Jae ORCID: https://orcid.org/0000-0001-8430-4797 and Lee, Myung-Hyun 2009. Sub-dB/cm propagation loss in silver stripe waveguides. Optics Express 17 (2) , pp. 697-702. 10.1364/OE.17.000697

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Abstract

We demonstrate sub-dB/cm propagation losses in polymer-based silver stripe waveguides at the wavelength of 1.31 μm. The silver stripe waveguides were fabricated in a low-loss fluorinated polymer clad. To form uniform metal stripe patterns, which are essential for reducing propagation loss, we developed a lift-off process using double layers of photoresist and SiNx. A propagation loss of less than 1.0 dB/cm was obtained with the 11-nm-thick silver stripes in the width range of 1.5 - 4.5 μm. A coupling loss of ~1.0 dB with a polarization maintaining single mode fiber was achieved for a width of 4.5 μm. For a width of 2.0 μm, we recorded a minimum propagation loss of 0.4 dB/cm, which is comparable with that of dielectric multi-mode waveguides.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	Optical Society of America
ISSN:	1094-4087
Date of Acceptance:	6 January 2009
Last Modified:	01 Nov 2022 09:56
URI:	https://orca.cardiff.ac.uk/id/eprint/89716

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