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Nonlinear optical processes in optically trapped InP nanowires


Wang, Fan and Reece, Peter J. and Paiman, Suriati and Gao, Qiang and Tan, Hark Hoe and Jagadish, Chennupati (2011) Nonlinear optical processes in optically trapped InP nanowires. Nano Letters, 11 (10). pp. 4149-4153. ISSN 1530-6984; ESSN: 1530-6992


We report on the observation of nonlinear optical excitation and related photoluminescence from single InP semiconductor nanowires held in suspension using a gradient force optical tweezers. Photoexcitation of free carriers is achieved through absorption of infrared (1.17 eV) photons from the trapping source via a combination of two- and three-photon processes. This was confirmed by power-dependent photoluminescence measurements. Marked differences in spectral features are noted between nonlinear optical excitation and direct excitation and are related to band-filling effects. Direct observation of second harmonic generation in trapped InP nanowires confirms the presence of nonlinear optical processes.

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Official URL or Download Paper: http://pubs.acs.org/doi/abs/10.1021/nl2020262

Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1021/nl2020262
Publisher: American Chemical Society
Keywords: Semiconductor nanowires; Photoluminescence; Optical tweezers; Multi-photon absorption
Depositing User: Nur Farahin Ramli
Date Deposited: 26 Nov 2013 03:01
Last Modified: 24 Aug 2016 02:04
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1021/nl2020262
URI: http://psasir.upm.edu.my/id/eprint/25261
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