Coherent anti-Stokes Raman scattering under electric field stimulation

被引：10

作者：

Capitaine, Erwan ^{[1
]}

Moussa, Nawel Ould ^{[1
]}

Louot, Christophe ^{[1
]}

Lefort, Claire ^{[1
]}

Pagnoux, Dominique ^{[1
]}

Duclere, Jean-Rene ^{[2
]}

Kaneyasu, Junya F. ^{[3
]}

Kano, Hideaki ^{[3
,4
,5
]}

Duponchel, Ludovic ^{[6
]}

Couderc, Vincent ^{[1
]}

Leproux, Philippe ^{[1
]}

机构：

[1] Univ Limoges, CNRS, XLIM UMR 7252, 123 Ave Albert Thomas, F-87060 Limoges, France

[2] Univ Limoges, CNRS, SPCTS UMR 7315, 12 Rue Atlantis, F-87068 Limoges, France

[3] Univ Tsukuba, Grad Sch Pure & Appl Sci, Dept Appl Phys, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058573, Japan

[4] Univ Tsukuba, Inst Appl Phys, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058573, Japan

[5] Univ Tsukuba, Tsukuba Res Ctr Interdisciplinary Mat Sci TIMS, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058571, Japan

[6] Univ Lille 1, CNRS, LASIR UMR 8516, Sci & Technol, F-59655 Villeneuve Dascq, France

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 24期

关键词：

CARS MICROSCOPY; HIGH-SENSITIVITY; BILAYERS;

D O I：

10.1103/PhysRevB.94.245136

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We introduce an experiment using electro-CARS, an electro-optical method based on the combination of ultra-broadband multiplex coherent anti-Stokes Raman scattering (M-CARS) spectroscopy and electric field stimulation. We demonstrate that this method can effectively discriminate the resonant CARS signal from the nonresonant background owing to a phenomenon of molecular orientation in the sample medium. Such molecular orientation is intrinsically related to the induction of an electric dipole moment by the applied static electric field. Evidence of the electro-CARS effect is obtained with a solution of n-alkanes (CnH2n+2, 15 <= n <= 40), for which an enhancement of the CARS signal-to-noise ratio is achieved in the case of CH2 and CH3 symmetric/asymmetric stretching vibrations. Additionally, an electric-field-induced second-harmonic generation experiment is performed in order to corroborate the orientational organization of molecules due to the electric field excitation. Finally, we use a simple mathematical approach to compare the vibrational information extracted from electro-CARS measurements with spontaneous Raman data and to highlight the impact of electric stimulation on the vibrational signal.

引用

页数：6

共 28 条

[1] Microchip Laser-Based Optoelectronic System for Kilovolt Picosecond Electromagnetic Pulse Generation [J].