Share Email Print
cover

Proceedings Paper

Linear and nonlinear optical properties of metallic nanocrystals in sapphire
Author(s): P. E. Mota-Santiago; A. Crespo-Sosa; J. L. Jiménez-Hernández; O. Sánchez-Dena; R. C. Fernández-Hernández; J. A. Reyes-Esqueda; A. Oliver
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

In this paper we report the linear and non-linear optical properties of metallic nano-clusters in α-Al2O3 fabricated by ion implantation (from 2 to 8×1016 ions/cm2). Thereafter, the samples were annealed at temperatures from 600 to 1100 °C in oxidising, reducing atmospheres. Once spherical nano-particles were synthesized, the samples were further irradiated with Si+++ with different energies and fluences to control the achieved anisotropy. As a result of the ion implantation mostly F+ color centers were formed. After thermal annealing they capture an electron to form F centers or combine to form a F2+ center. Also, the photoluminescence signal from Al+ interstitials appears. Regarding the non-linear optical response, the spherical-like Au nano-crystals embedded in sapphire show a positive non-linear absorption at 355 nm and negative non-linear absorption at 532 nm, which shows saturation when increasing the incident irradiance. They also present positive non-linear refraction at 532 nm, which is null at 355 nm. For the anisotropic systems, a larger birefringence than natural values was measured in the visible range by ellipsometry means.

Paper Details

Date Published: 26 October 2011
PDF: 10 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80113V (26 October 2011); doi: 10.1117/12.903344
Show Author Affiliations
P. E. Mota-Santiago, Univ. Nacional Autónoma de México (Mexico)
A. Crespo-Sosa, Univ. Nacional Autónoma de México (Mexico)
J. L. Jiménez-Hernández, Univ. Nacional Autónoma de México (Mexico)
O. Sánchez-Dena, Univ. Nacional Autónoma de México (Mexico)
R. C. Fernández-Hernández, Univ. Nacional Autónoma de México (Mexico)
J. A. Reyes-Esqueda, Univ. Nacional Autónoma de México (Mexico)
A. Oliver, Univ. Nacional Autónoma de México (Mexico)


Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World

© SPIE. Terms of Use
Back to Top