Exciton-LO-phonon interaction of CuCl spherical quantum dots studied by resonant hyper-Raman spectroscopy

被引：24

作者：

Baranov, AV

Yamauchi, S

Matsumoto, Y

机构：

[1] UNIV TSUKUBA, INST PHYS, TSUKUBA, IBARAKI 305, JAPAN

[2] SI VAVILOV STATE OPT INST, ST PETERSBURG 199034, RUSSIA

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.56.10332

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Resonant hyper-Raman-scattering spectroscopy was applied for studies of the exciton-LO-phonon interaction in spherical CuCl nanocrystals of different sizes embedded in a glass matrix. Both the LO and 2LO phonon bands have shown a prominent resonance with the lowest energy 1S confined exciton state. The ratio of the integral intensities of the LO and 2LO bands rho was found to increase with increase of the incident photon energy, or decrease of the nanocrystal radius. The Huang-Rhys factor S has been calculated as a function of the nanocrystal size from the experimentally measured values of rho on the offset harmonic-oscillator model of electron-vibrational coupling. It has been found that S increases monotonically from 0.22 to 0.7, with the nanocrystal radius decreasing from 3.6 to 1.6 nm.

引用

页码：10332 / 10337

页数：6

共 30 条

[11] Anomalous features of resonant hyper-Raman scattering in CuBr quantum dots: Evidence of exciton-phonon-coupled states similar to molecules [J].

Inoue, K ;

Yamanaka, A ;

Toba, K ;

Baranov, AV ;

Onushchenko, AA ;

Fedorov, AV .

PHYSICAL REVIEW B, 1996, 54 (12) :R8321-R8324

[12] POLARON AND EXCITON-PHONON COMPLEXES IN CUCL NANOCRYSTALS [J].

ITOH, T ;

NISHIJIMA, M ;

EKIMOV, AI ;

GOURDON, C ;

EFROS, AL ;

ROSEN, M .

PHYSICAL REVIEW LETTERS, 1995, 74 (09) :1645-1648

[13]

KAWAZOE T, 1997, PHYS SOC JPN, V52, P16

[14] SIZE DEPENDENCE OF ELECTRON-PHONON COUPLING IN SEMICONDUCTOR NANOSPHERES - THE CASE OF CDSE [J].

KLEIN, MC ;

HACHE, F ;

RICARD, D ;

FLYTZANIS, C .

PHYSICAL REVIEW B, 1990, 42 (17) :11123-11132

[15] Raman-scattering study of exciton-phonon coupling in PbS nanocrystals [J].

Krauss, TD ;

Wise, FW .

PHYSICAL REVIEW B, 1997, 55 (15) :9860-9865

[16]

KURIBAYASHI R, 1997, PHYS SOC JPN, V52, P197

[17] COMPUTATION OF THE INTENSITIES OF VIBRATIONAL SPECTRA OF ELECTRONIC BANDS IN DIATOMIC MOLECULES [J].

MANNEBACK, C .

PHYSICA, 1951, 17 (11-1) :1001-1010

[18] EXCITON-PHONON INTERACTION IN CDSE AND CUCL POLAR SEMICONDUCTOR NANOSPHERES [J].

MARINI, JC ;

STEBE, B ;

KARTHEUSER, E .

PHYSICAL REVIEW B, 1994, 50 (19) :14302-14308

[19] MULTIPHONON PROCESSES IN YBS [J].

MERLIN, R ;

GUNTHERODT, G ;

HUMPHREYS, R ;

CARDONA, M ;

SURYANARAYANAN, R ;

HOLTZBERG, F .

PHYSICAL REVIEW B, 1978, 17 (12) :4951-4958

[20]

Myers A.B., 1987, BIOL APPL RAMAN SPEC, V2, P1

← 1 2 3 →