Observation of birefringence in BBO crystals in the terahertz regime

被引：4

作者：

Saito, Shigeki ^{[1
]}

Estacio, Elmer ^{[1
]}

Nakazato, Tomoharu ^{[1
]}

Furukawa, Yusuke ^{[1
]}

Shimizu, Toshihiko ^{[1
]}

Sarukura, Nobuhiko ^{[1
]}

Cadatal, Marilou

Pham, Minh Hong ^{[2
]}

Ponseca, Carlito, Jr. ^{[2
]}

Mizuseki, Hiroshi ^{[3
]}

Kawazoe, Yoshiyuki ^{[3
]}

机构：

[1] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan

[2] Grad Univ Adv Studies, Shonan Village, Hayama 2400193, Japan

[3] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF CRYSTAL GROWTH | 2009年 / 311卷 / 03期

关键词：

Beta barium borate; Birefringence; Terahertz; BETA-BARIUM BORATE; SPECTROSCOPY; BETA-BAB2O4; GENERATION; RADIATION; BAB2O4; LINBO3;

D O I：

10.1016/j.jcrysgro.2008.09.130

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

We present experimental results of birefringence in beta barium borate (beta-BaB2O4 or BBO) crystals in the 0.2-1 terahertz (THz) frequency range. Standard polarized THz-transmission spectroscopy of a BBO Slab Cut under 90 was performed at different azimuthal orientations to determine the ordinary and extraordinary refractive indices. An average Lambda n/n value of 0.118 was calculated. Moreover. azimuthal angle-dependent absorption was observed at about 0.65THz, in close agreement with calculations based on first principles. Our calculations showed the absorption feature was due to the low-frequency phonon modes of the [B3O6](3) rings. These results suggest that a BBO-based THz optical-parametric-oscillator design is feasible. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：895 / 898

页数：4

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