2-PHOTON ABSORPTION-SPECTRA OF QUASI-LOW-DIMENSIONAL EXCITON SYSTEMS

被引：34

作者：

SHIMIZU, A

OGAWA, T

SAKAKI, H

机构：

[1] EXPLORATORY RES ADV TECHNOL, JOINT RES & DEV CTR, QUANTUM WAVE PROJECT, MEGURO KU, TOKYO 153, JAPAN

[2] NIPPON TELEGRAPH & TEL PUBL CORP, MUSASHINO ELECT COMMUN LAB, BASIC RES LABS, MUSASHINO, TOKYO 180, JAPAN

[3] UNIV TOKYO, INST IND SCI, TOKYO 113, JAPAN

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.45.11338

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a unified theory for two-photon absorption (TPA) spectra of Wannier excitons in a low-dimensional semiconductor of an arbitrary dimension d = 0, 1, 2, and 3. It is found that the spectra strongly reflect the anisotropies of both the band structure and the quasi-d-dimensional exciton envelope functions. Therefore the low dimensionality can be sensitively detected by the TPA spectroscopy. This is in striking contrast to the one-photon absorption spectra, anisotropies of which cannot be taken as evidence of quantum confinements.

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页码：11338 / 11341

页数：4

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