Persistent spectral-hole-burning spectroscopy of CuCl quantum cubes
Persistent spectral-hole-burning spectroscopy of CuCl quantum cubes
复制标题
CuCl量子立方体的持久光谱烧孔光谱
DOI：
10.1103/physrevb.56.4051
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发表时间：
1997
影响因子：
3.7
通讯作者：
Y. Masumoto
中科院分区：
文献类型：
--
作者：
Naru Sakakura;Y. Masumoto
将持续光谱烧孔（PSHB）现象成功地应用于NaCl晶体中CuCl量子点的精确择位光谱。在CuCl量子点的PSHB谱中，观察到共振烧孔和低能卫星孔。这些卫星空穴被认为是起源于基态的空穴燃烧，这是由于在CuCl量子点中限制的激子的相应激发态的位置选择性激发。用无限高势垒量子立方体中粒子的简单概念很好地解释了共振烧孔与卫星孔之间的能量关系。然而，实际的量子点被认为是有点偏离立方体，导致违反量子立方体中的光学选择规则。一个形的量子点模型是几乎一致的Z3激子吸收带中观察到的振荡精细结构。将其光谱分解为激子的基态和第一激发态，发现第一激发态主要位于Z3激子吸收带的高能区.这一结果得到了Z3激子的光致发光光谱的支持。
A persistent spectral-hole-burning (PSHB) phenomenon was successfully applied to the precise site-selective spectroscopy of CuCl quantum dots embedded in NaCl crystals. In the PSHB spectra of CuCl quantum dots, a resonantly burned hole and lower-energy satellite holes were observed. These satellite holes are supposed to originate from hole burning of the ground states, which results from site-selective excitation of the corresponding excited states of excitons confined in CuCl quantum dots. Energy relation between the resonantly burned hole and each satellite hole is well explained by the simple concept of a particle in a quantum cube with an infinitely high potential barrier. However, actual quantum dots are considered to be a little deviated from cubes, resulting in the violation of the optical selection rule in quantum cubes. A cubic-shaped quantum-dot model is almost consistent with oscillatory fine structures observed in the Z 3 exciton absorption band. Its spectral decomposition into the ground state and the first excited state of excitons was made, and showed that the first excited state is in majority at the higher-energy region of the Z 3 exciton absorption band. This result was supported by the photoluminescence spectrum of the Z 3 exciton.