Caspani, L. et al. (2016) Enhanced nonlinear refractive index in epsilon-near-zero materials. Physical Review Letters, 116(23), 233901. (doi: 10.1103/PhysRevLett.116.233901)
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119205.pdf - Accepted Version 3MB |
Abstract
New propagation regimes for light arise from the ability to tune the dielectric permittivity to extremely low values. Here, we demonstrate a universal approach based on the low linear permittivity values attained in the ε-near-zero (ENZ) regime for enhancing the nonlinear refractive index, which enables remarkable light-induced changes of the material properties. Experiments performed on Al-doped ZnO (AZO) thin films show a sixfold increase of the Kerr nonlinear refractive index (n2) at the ENZ wavelength, located in the 1300 nm region. This in turn leads to ultrafast light-induced refractive index changes of the order of unity, thus representing a new paradigm for nonlinear optics.
| Item Type: | Articles |
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| Additional Information: | L.C. and M.F. acknowledge the support from the People Programme (Marie Curie Actions) of the European Union's FP7 Programme under REA grant agreement no. 627478 (THREEPLE) and no. 329346 (ATOMIC), respectively. D.F. acknowledges financial support from the European Research Council under the European Union Seventh Framework Programme (FP/2007-2013)/ERC GA 306559 and EPSRC (UK, Grant EP/M009122/1). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Faccio, Professor Daniele and Clerici, Professor Matteo |
| Authors: | Caspani, L., Kaipurath, R.P.M., Clerici, M., Ferrera, M., Roger, T., Kim, J., Kinsey, N., Pietrzyk, M., Di Falco, A., Shalaev, V.M., Boltasseva, A., and Faccio, D. |
| 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: | Physical Review Letters |
| Publisher: | American Physical Society |
| ISSN: | 0031-9007 |
| ISSN (Online): | 1079-7114 |
| Published Online: | 08 June 2016 |
| Copyright Holders: | Copyright © 2016 American Physical Society |
| First Published: | First published in Physical Review Letters 116(23):233901 |
| Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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