ULTRAVIOLET-RADIATION-INDUCED CHEMICAL-REACTIONS THROUGH ONE-PHOTON AND 2-PHOTON ABSORPTION PROCESSES IN GEO2-SIO2 GLASSES

被引：77

作者：

NISHII, J ^{[1
]}

KITAMURA, N ^{[1
]}

YAMANAKA, H ^{[1
]}

HOSONO, H ^{[1
]}

KAWAZOE, H ^{[1
]}

机构：

[1] TOKYO INST TECHNOL,ENGN MAT RES LAB,MIDORI KU,YOKOHAMA,KANAGAWA 227,JAPAN

来源：

OPTICS LETTERS | 1995年 / 20卷 / 10期

关键词：

D O I：

10.1364/OL.20.001184

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photochemical reactions in 10 GeO2-90 SiO2 glass induced by irradiation with excimer lasers (KrF, 5.0 eV, XeCl, 4.0 eV) and a Hg lamp (4.9 eV) were examined. The irradiation with excimer lasers generated two types of paramagnetic defect, an electron-trapped center associated with fourfold coordinated Ge ions and a self-trapped hole center on bridging oxygen. Taking the optical band gap (similar to 7.1 eV) of the glass obtained in this work and the power density of laser pulses [10-90 mJ/(cm(2) pulse), pulse duration 20 ns] into account, we concluded that these centers were formed by band-to-band excitation by two-photon absorption process. On the ether hand, the lamp illumination (similar to 16 mW/cm(2)) caused the formation of Ge E' centers from preexisting oxygen-vacancy-type defects by the one-photon absorption process. These two kinds of reaction proceed independently, depending on the power densities of UV beams, at least in our experimental condition.

引用

页码：1184 / 1186

页数：3

共 16 条

[1] FIBER BRAGG REFLECTORS PREPARED BY A SINGLE EXCIMER PULSE [J].

ASKINS, CG ;

TSAI, TE ;

WILLIAMS, GM ;

PUTNAM, MA ;

BASHKANSKY, M ;

FRIEBELE, EJ .

OPTICS LETTERS, 1992, 17 (11) :833-835

[2] OBSERVATIONS OF CHANGES IN UV ABSORPTION-BANDS OF SINGLEMODE GERMANOSILICATE CORE OPTICAL FIBERS ON WRITING AND THERMALLY ERASING REFRACTIVE-INDEX GRATINGS [J].

ATKINS, RM ;

MIZRAHI, V .

ELECTRONICS LETTERS, 1992, 28 (18) :1743-1744

[3] 248 NM INDUCED VACUUM UV SPECTRAL CHANGES IN OPTICAL-FIBER PREFORM CORES - SUPPORT FOR A COLOR CENTER MODEL OF PHOTOSENSITIVITY [J].

ATKINS, RM ;

MIZRAHI, V ;

ERDOGAN, T .

ELECTRONICS LETTERS, 1993, 29 (04) :385-387

[4]

Friebele E. J., 1985, MATER RES SOC S P, V61, DOI 10.1557/PROC-61-319

[5] SELF-TRAPPED HOLES IN AMORPHOUS-SILICON DIOXIDE [J].

GRISCOM, DL .

PHYSICAL REVIEW B, 1989, 40 (06) :4224-4227

[6] NATURE AND ORIGIN OF THE 5-EV BAND IN SIO2-GEO2 GLASSES [J].

HOSONO, H ;

ABE, Y ;

KINSER, DL ;

WEEKS, RA ;

MUTA, K ;

KAWAZOE, H .

PHYSICAL REVIEW B, 1992, 46 (18) :11445-11451

[7] 2 TYPES OF OXYGEN-DEFICIENT CENTERS IN SYNTHETIC SILICA GLASS [J].

IMAI, H ;

ARAI, K ;

IMAGAWA, H ;

HOSONO, H ;

ABE, Y .

PHYSICAL REVIEW B, 1988, 38 (17) :12772-12775

[8] EFFECT OF MODES OF GLASS-FORMATION ON STRUCTURE OF INTRINSIC OR PHOTON INDUCED DEFECTS CENTERED ON III-CATION IV-CATION OR V-CATION IN OXIDE GLASSES [J].

KAWAZOE, H .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1985, 71 (1-3) :231-243

[9]

Meltz G, 1991, P SOC PHOTO-OPT INS, V1516, P185, DOI [10.1117/12.51164, DOI 10.1117/12.51164]

[10] CHARACTERISTICS OF 5-EV ABSORPTION-BAND IN SPUTTER-DEPOSITED GEO2-SIO2 THIN GLASS-FILMS [J].

NISHII, J ;

YAMANAKA, H ;

HOSONO, H ;

KAWAZOE, H .

APPLIED PHYSICS LETTERS, 1994, 64 (03) :282-284

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