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Incorporating polaritonic effects in semiconductor nanowire waveguide dispersion

Source: Appl. Phys. Lett. 97, 061115 (2010); doi:10.1063/1.3479896

Published 13 August 2010

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ISSN:
1553-9644 (online)
Publisher:
AIP is a member of CrossRef AIP
Lambert K. van Vugt, Brian Piccione, and Ritesh Agarwal
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
We present the calculated and measured energy-propagation constant (E-beta) dispersion of CdS nanowire waveguides at room temperature, where we include dispersive effects via the exciton-polariton model using physical parameters instead of a phenomenological equation. The experimental data match well with our model while the phenomenological equation fails to capture effects originating due to light-matter interaction in nanoscale cavities. Due to the excitonic-polaritonic effects, the group index of the guided light peaks close to the band edge, which can have important implications for optical switching and sensor applications. ©2010 American Institute of Physics
History: Received 26 March 2010; accepted 12 July 2010; published 13 August 2010
Permalink: http://link.aip.org/link/?APPLAB/97/061115/1

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