Carnemolla, E. G., Caspani, L., DeVault, C., Clerici, M. , Vezzoli, S., Bruno, V., Shalaev, V. M., Faccio, D. , Boltasseva, A. and Ferrera, M. (2018) Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides. Optical Materials Express, 8(11), pp. 3392-3400. (doi: 10.1364/OME.8.003392)
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Abstract
We report the simultaneous increase of both nonlinear Kerr coefficient n2 and third-order nonlinear susceptibility X(a) in aluminum zinc oxide (AZO) attained by pumpprobe spectroscopy in a frequency degenerate configuration. Our experiments demonstrate a 6-fold enhancement in the third-order nonlinear susceptibility and over one order of magnitude increase in the nonlinear Kerr coefficient, while also determining two distinct operational wavelengths for optimal modulation of either the real or the imaginary part of the complex refractive index. These results, besides providing a broader spectral characterization of the third-order nonlinearity in AZO thin films, also show the fundamental advantages of performing nonlinear optics via degenerate excitation near the ENZ wavelength.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Bruno, Mr Vincenzo and Clerici, Professor Matteo and Vezzoli, Dr Stefano and Faccio, Professor Daniele |
| Authors: | Carnemolla, E. G., Caspani, L., DeVault, C., Clerici, M., Vezzoli, S., Bruno, V., Shalaev, V. M., Faccio, D., Boltasseva, A., and Ferrera, M. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Optical Materials Express |
| Publisher: | Optical Society of America |
| ISSN: | 2159-3930 |
| ISSN (Online): | 2159-3930 |
| Published Online: | 17 October 2018 |
| Copyright Holders: | Copyright © 2018 The Optical Society |
| First Published: | First published in Optical Materials Express 8(11): 3392-3400 |
| Publisher Policy: | Reproduced under a Creative Commons License |
| Data DOI: | 10.17861/f9701bb5-2534-4f91-bd25-2e605b22e0f0 |
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