On the observation of dispersion in tunable second-order nonlinearities of silicon-rich nitride thin films

Hung-Hsi Lin; Rajat Sharma; Alex Friedman; Benjamin M. Cromey; Felipe Vallini; Matthew W. Puckett; Khanh Kieu; Yeshaiahu Fainman

doi:10.1063/1.5053704

APL Photonics (Mar 2019)

On the observation of dispersion in tunable second-order nonlinearities of silicon-rich nitride thin films

Hung-Hsi Lin,
Rajat Sharma,
Alex Friedman,
Benjamin M. Cromey,
Felipe Vallini,
Matthew W. Puckett,
Khanh Kieu,
Yeshaiahu Fainman

Affiliations

Hung-Hsi Lin: Materials Science and Engineering, University of California, 9500 Gilman Drive, La Jolla, San Diego, California 92093, USA
Rajat Sharma: Department of Electrical and Computer Engineering, University of California, 9500 Gilman Drive, La Jolla, San Diego, California 92093, USA
Alex Friedman: Department of Electrical and Computer Engineering, University of California, 9500 Gilman Drive, La Jolla, San Diego, California 92093, USA
Benjamin M. Cromey: College of Optical Sciences, The University of Arizona, 1630 E University Blvd., Tucson, Arizona 85719, USA
Felipe Vallini: Department of Electrical and Computer Engineering, University of California, 9500 Gilman Drive, La Jolla, San Diego, California 92093, USA
Matthew W. Puckett: Department of Electrical and Computer Engineering, University of California, 9500 Gilman Drive, La Jolla, San Diego, California 92093, USA
Khanh Kieu: College of Optical Sciences, The University of Arizona, 1630 E University Blvd., Tucson, Arizona 85719, USA
Yeshaiahu Fainman: Department of Electrical and Computer Engineering, University of California, 9500 Gilman Drive, La Jolla, San Diego, California 92093, USA

DOI: https://doi.org/10.1063/1.5053704
Journal volume & issue: Vol. 4, no. 3
pp. 036101 – 036101-6

Abstract

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We present experimental results on second-harmonic generation in non-stoichiometric, silicon-rich nitride films. The as-deposited film presents a second-order nonlinear coefficient, or χ(2), as high as 8 pm/V. This value can be widely tuned using the electric field induced second harmonic effect, and a maximum value of 22.7 pm/V was achieved with this technique. We further illustrate that the second-order nonlinear coefficient exhibited by these films can be highly dispersive in nature and require further study and analysis to evaluate their viability for in-waveguide applications at telecommunication wavelengths.

Published in APL Photonics

ISSN: 2378-0967 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: https://aplphotonics.aip.org

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