Homogeneious linewidth and relaxation of excited hole states in II–VI quantum dots
作者： U. Woggon , S. V. Gaponenko , A. Uhrig , W. Langbein , C. Klingshirn
关键词:
摘要: By use of differential absorption spectroscopy at different temperatures we investigate the homogeneous line broadening small CdSxSe1 − x quantum dots embedded in glass. Our experiments show strong correlation between precipitation stages and characteristics optical parameters such as saturation intensity longitudinal transverse relaxation times. In samples grown diffusion-controlled regime to avoid coalescence, find after laser excitation for first time spectrally narrow holes non-linear spectra. These sharp resonances with a halfwidth Γ only 10 meV T = 20 K allow us energetic distance lowest hole levels temperature dependence broadening. The contributions LO phonon coupling temperature-independent scattering linewidth will be analysed. from excited states has been investigated by exciting higher-energy measuring resulting change ground state absorption.
sci-hub.se 参考文章(36)
Al.L. Efros, Optical properties of semiconductor nanocrystals with degenerate valence band Superlattices and Microstructures. ,vol. 11, pp. 167- 169 ,(1992) , 10.1016/0749-6036(92)90244-Y
Shintaro Nomura, Takayoshi Kobayashi, Exciton-LO-phonon couplings in spherical semiconductor microcrystallites. Physical Review B. ,vol. 45, pp. 1305- 1316 ,(1992) , 10.1103/PHYSREVB.45.1305
A I Ekimov, Optical Properties of Semiconductor Quantum Dots in Glass Matrix Physica Scripta. ,vol. 39, pp. 217- 222 ,(1991) , 10.1088/0031-8949/1991/T39/033
M. C. Klein, F. Hache, D. Ricard, C. Flytzanis, Size dependence of electron-phonon coupling in semiconductor nanospheres: The case of CdSe. Physical Review B. ,vol. 42, pp. 11123- 11132 ,(1990) , 10.1103/PHYSREVB.42.11123
U. Woggon, I. Rückmann, J. Kornack, M. Müller, J. Cesnulevicius, M. Petrauskas, J. Kolenda, Interface transfer processes and spectral hole burning in CdSe quantum confined clusters Journal of Crystal Growth. ,vol. 117, pp. 608- 613 ,(1992) , 10.1016/0022-0248(92)90823-2
Fuyu Yan, J.M. Parker, Quantum size effects in a heat-treated CdSe-doped glass Journal of Non-crystalline Solids. ,vol. 112, pp. 277- 281 ,(1989) , 10.1016/0022-3093(89)90536-X
F. Hache, M. C. Klein, D. Ricard, C. Flytzanis, Photoluminescence study of Schott commercial and experimental CdSSe-doped glasses: observation of surface states Journal of The Optical Society of America B-optical Physics. ,vol. 8, pp. 1802- 1806 ,(1991) , 10.1364/JOSAB.8.001802
N. F. Borrelli, D. W. Hall, H. J. Holland, D. W. Smith, Quantum confinement effects of semiconducting microcrystallites in glass Journal of Applied Physics. ,vol. 61, pp. 5399- 5409 ,(1987) , 10.1063/1.338280
A. P. Alivisatos, A. L. Harris, N. J. Levinos, M. L. Steigerwald, L. E. Brus, Electronic states of semiconductor clusters: Homogeneous and inhomogeneous broadening of the optical spectrum The Journal of Chemical Physics. ,vol. 89, pp. 4001- 4011 ,(1988) , 10.1063/1.454833
L. Brus, Quantum crystallites and nonlinear optics Applied Physics A Solids and Surfaces. ,vol. 53, pp. 465- 474 ,(1991) , 10.1007/BF00331535