Fabrication of Microstructures in LiF Crystals by a Femtosecond Laser

Chin. Phys. Lett.

2003, Vol. 20

Issue (10): 1858-1860 DOI:

Original Articles

Fabrication of Microstructures in LiF Crystals by a Femtosecond Laser

ZHAO Quan-Zhong;QIU Jian-Rong;YANG Lü-Yun;JIANG Xiong-Wei;ZHAO Chong-Jun;ZHU Cong-Shan

Photon Craft Project, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800

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ZHAO Quan-Zhong, QIU Jian-Rong, YANG Lü-Yun et al 2003 Chin. Phys. Lett. 20 1858-1860

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Abstract We report the space-selective formation of colour centres and refractive index change in LiF crystals at room temperature by an 800 nm Ti:sapphire femtosecond laser irradiation. Optical absorption and photoluminescence spectra have been measured for the crystal before and after the laser irradiation. The absorption spectra indicate F and F⁺₃ colour centres are induced in LiF after the laser irradiation. When the temperature of heat treatment reaches 300°C, the absorption peak disappears, indicating that the induced colour centres are bleached. The induced refractive index change is also evaluated. A mechanism for the formation of colour centres and refractive index change is proposed.

Keywords: 78.55.Fv 76.30.Mi 82.50.Pt

Published: 01 October 2003

PACS:	78.55.Fv	(Solid alkali halides)
	76.30.Mi	(Color centers and other defects)
	82.50.Pt	(Multiphoton processes)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2003/V20/I10/01858

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	ZHAO Quan-Zhong
	QIU Jian-Rong
	YANG Lü-Yun
	JIANG Xiong-Wei
	ZHAO Chong-Jun
	ZHU Cong-Shan

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