COLLINEAR PHOTOTHERMAL DEFLECTION SPECTROSCOPY WITH LIGHT-SCATTERING SAMPLES

被引：31

作者：

SPEAR, JD ^{[1
]}

RUSSO, RE ^{[1
]}

SILVA, RJ ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

来源：

APPLIED OPTICS | 1990年 / 29卷 / 28期

关键词：

Light scattering; Photothermal deflection spectroscopy;

D O I：

10.1364/AO.29.004225

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An analytical model that incorporates effects of light scattering was developed for dual-beam photothermal deflection spectroscopy. Thermal gradients induced by a modulated excitation beam deflect an optical probe beam which was treated as being of finite dimensions. Mechanisms by which thermal gradients produce refractive index gradients are discussed, with an explicit expression for dn/dT being derived. Experimental studies with suspensions of small latex particles in Nd3+ solutions demonstrated that the model accurately predicts both the shape of the deflection signal and the attenuation of the signal due to light scattering. The absolute magnitude of the observed signal is approximately predicted by theory. © 1990 Optical Society of America.

引用

页码：4225 / 4234

页数：10

共 20 条

[1] PHOTOTHERMAL MEASUREMENTS USING A LOCALIZED EXCITATION SOURCE [J].

AAMODT, LC ;

MURPHY, JC .

JOURNAL OF APPLIED PHYSICS, 1981, 52 (08) :4903-4914

[2]

AKHMANOV SA, 1972, LASER HDB, P1151

[3] THERMOOPTICAL SPECTROSCOPY - DETECTION BY THE MIRAGE EFFECT [J].

BOCCARA, AC ;

FOURNIER, D ;

BADOZ, J .

APPLIED PHYSICS LETTERS, 1980, 36 (02) :130-132

[4]

CAMPILLO AJ, 1989, PHOTOTHERMAL INVESTI, P321

[5] THEORY FOR LASER-INDUCED PHOTOTHERMAL REFRACTION [J].

DOVICHI, NJ ;

NOLAN, TG ;

WEIMER, WA .

ANALYTICAL CHEMISTRY, 1984, 56 (09) :1700-1704

[6]

Fang H L, 1983, ULTRASENSITIVE LASER, P175

[7] PHOTOTHERMAL DEFLECTION SPECTROSCOPY AND DETECTION [J].

JACKSON, WB ;

AMER, NM ;

BOCCARA, AC ;

FOURNIER, D .

APPLIED OPTICS, 1981, 20 (08) :1333-1344

[8] PROBE BEAM SIZE EFFECTS IN PHOTOTHERMAL DEFLECTION EXPERIMENTS [J].

LASALLE, EL ;

LEPOUTRE, F ;

ROGER, JP .

JOURNAL OF APPLIED PHYSICS, 1988, 64 (01) :1-5

[9] FUNDAMENTAL-MODE LASER-BEAM PROPAGATION IN OPTICALLY INHOMOGENEOUS ELECTROCHEMICAL MEDIA WITH CHEMICAL-SPECIES CONCENTRATION GRADIENTS [J].

MANDELIS, A ;

ROYCE, BSH .

APPLIED OPTICS, 1984, 23 (17) :2892-2901

[10] PHOTOTHERMAL BEAM-DEFLECTION IMAGING OF VERTICAL INTERFACES IN SOLIDS [J].

MCDONALD, FA ;

WETSEL, GC ;

JAMIESON, GE .

CANADIAN JOURNAL OF PHYSICS, 1986, 64 (09) :1265-1268

← 1 2 →