Ridge waveguide as a near-field optical source
- 1 December 2003
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 83 (22) , 4474-4476
- https://doi.org/10.1063/1.1631057
Abstract
We investigate the feasibility of using a ridge waveguide at optical frequencies as a near-field optical transducer, using the finite difference time domain method. The complete electromagnetic field picture of the ridge waveguide, in the absence and presence of the irradiated medium, is presented. A power efficiency of 7% and an optical spot with full width half maximum of 50 nm×80 nm is obtained in the medium. We show that impedance considerations play a major role in the transducer-medium optical coupling.This publication has 15 references indexed in Scilit:
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