Linear and nonlinear optical properties of metallic nanocrystals in sapphire
(2011) 22nd Congress of the International Commission for Optics: Light for the Development of the World In Proceedings of SPIE - The International Society for Optical Engineering 8011.- Abstract
In this paper we report the linear and non-linear optical properties of metallic nano-clusters in α-Al 2O 3 fabricated by ion implantation (from 2 to 8×10 16 ions/cm 2). 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 F 2 + center. Also, the photoluminescence signal... (More)
In this paper we report the linear and non-linear optical properties of metallic nano-clusters in α-Al 2O 3 fabricated by ion implantation (from 2 to 8×10 16 ions/cm 2). 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 F 2 + 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.
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- author
- Mota-Santiago, P. E. LU ; Crespo-Sosa, A. ; Jiménez-Hernández, J. L. ; Sánchez-Dena, O. ; Fernández-Hernández, R. C. ; Reyes-Esqueda, J. A. and Oliver, A.
- publishing date
- 2011
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- optical absorption, optical properties, photoluminescence, sapphire, saturated absorption, Z-scan
- host publication
- 22nd Congress of the International Commission for Optics : Light for the Development of the World - Light for the Development of the World
- series title
- Proceedings of SPIE - The International Society for Optical Engineering
- volume
- 8011
- article number
- 80113V
- conference name
- 22nd Congress of the International Commission for Optics: Light for the Development of the World
- conference location
- Puebla, Mexico
- conference dates
- 2011-08-15 - 2011-08-19
- external identifiers
-
- scopus:84858405536
- ISSN
- 0277-786X
- ISBN
- 9780819485854
- DOI
- 10.1117/12.903344
- language
- English
- LU publication?
- no
- id
- 52577e21-ddfd-48a0-b4d8-9ca65572db89
- date added to LUP
- 2023-04-05 16:08:02
- date last changed
- 2025-04-04 14:52:27
@inproceedings{52577e21-ddfd-48a0-b4d8-9ca65572db89,
abstract = {{<p>In this paper we report the linear and non-linear optical properties of metallic nano-clusters in α-Al <sub>2</sub>O <sub>3</sub> fabricated by ion implantation (from 2 to 8×10 <sup>16</sup> ions/cm <sup>2</sup>). 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 <sup>+++</sup> with different energies and fluences to control the achieved anisotropy. As a result of the ion implantation mostly F <sup>+</sup> color centers were formed. After thermal annealing they capture an electron to form F centers or combine to form a F <sub>2</sub> <sup>+</sup> center. Also, the photoluminescence signal from Al <sup>+</sup> 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.</p>}},
author = {{Mota-Santiago, P. E. and Crespo-Sosa, A. and Jiménez-Hernández, J. L. and Sánchez-Dena, O. and Fernández-Hernández, R. C. and Reyes-Esqueda, J. A. and Oliver, A.}},
booktitle = {{22nd Congress of the International Commission for Optics : Light for the Development of the World}},
isbn = {{9780819485854}},
issn = {{0277-786X}},
keywords = {{optical absorption; optical properties; photoluminescence; sapphire; saturated absorption; Z-scan}},
language = {{eng}},
series = {{Proceedings of SPIE - The International Society for Optical Engineering}},
title = {{Linear and nonlinear optical properties of metallic nanocrystals in sapphire}},
url = {{http://dx.doi.org/10.1117/12.903344}},
doi = {{10.1117/12.903344}},
volume = {{8011}},
year = {{2011}},
}