Carnemolla, E. G., Jaffray, W., Clerici, M. , Caspani, L., Faccio, D. , Biancalana, F., DeVault, C., Shalaev, V. M., Boltasseva, A. and Ferrera, M. (2021) Visible photon generation via four-wave mixing in near-infrared near-zero-index thin films. Optics Letters, 46(21), pp. 5433-5436. (doi: 10.1364/OL.433834) (PMID:34724494)
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Abstract
Optical nonlinearities can be strongly enhanced by operating in the so-called near-zero-index (NZI) regime, where the real part of the refractive index of the system under investigation approaches zero. Here we experimentally demonstrate semi-degenerate four-wave mixing (FWM) in aluminum zinc oxide thin films generating radiation tunable in the visible spectral region, where the material is highly transparent. To this end, we employed an intense pump (787 nm) and a seed tunable in the NIR window (1100–1500 nm) to generate a visible idler wave (530–620 nm). Experiments show enhancement of the frequency conversion efficiency with a maximum of 2% and a signal-to-pump detuning of 360 nm. Effective idler wavelength tuning has also been demonstrated by operating on the temporal delay between the pump and signal.
Item Type: | Articles |
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Additional Information: | Funding. Air Force Office of Scientific Research (FA9550-18-1-0002); Engineering and Physical Sciences Research Council (EP/P005446/1); Division of Materials Research (DE-SC0017717); Office of Naval Research (N00014-20-1-2199); Carnegie Trust for the Universities of Scotland (RIG009891); UK Research and Innovation (EP/S001573/1). |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Faccio, Professor Daniele and Clerici, Professor Matteo |
Authors: | Carnemolla, E. G., Jaffray, W., Clerici, M., Caspani, L., Faccio, D., Biancalana, F., DeVault, C., Shalaev, V. M., 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: | Optics Letters |
Publisher: | Optical Society of America |
ISSN: | 0146-9592 |
ISSN (Online): | 1539-4794 |
Published Online: | 28 October 2021 |
Copyright Holders: | Copyright © 2021 Optica Publishing Group |
First Published: | First published in Optics Letters 46(21): 5433-5436 |
Publisher Policy: | Reproduced under a Creative Commons licence |
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