Structure and optical properties of Ge/Si quantum dots formed by driving the evolution of Ge thin films via thermal annealing
Structure and optical properties of Ge/Si quantum dots formed by driving the evolution of Ge thin films via thermal annealing
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热退火驱动Ge薄膜演化形成的Ge/Si量子点的结构和光学性质
DOI:
10.7567/jjap.57.045602
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发表时间:
2018-03
影响因子:
1.5
通讯作者:
Y. Yang
中科院分区:
文献类型:
--
作者:
Q.J. Shu;J. Yang;Q.B. Chi;T. Sun;C. Wang;Y. Yang
Ge/Si quantum dots (QDs) are fabricated by driving the transformation of a Ge thin film-deposited using the direct current (DC) magnetron sputtering technique by controlling the subsequent in situ annealing processes. The experimental results indicate that, with the increase in annealing temperature, the volume of Ge QDs increases monotonically, while the QD density initially increases then decreases. The maximal QD density can reach 1.1 × 1011 cm−2 after a 10 min annealing at 650 °C. The Ge–Ge peak of Ge QDs obtained by Raman spectroscopy initially undergoes a blue shift and then a red shift with increasing annealing temperature. This behavior results from the competition between the dislocation and the strain relaxation in QDs. Concurrently, a series of photoelectric detectors are fabricated to evaluate the photoelectric performance of these annealed Ge QD samples. A high-photoelectricity response is demonstrated in the QD sample annealed at 650 °C. Our results pave a promising way for whole-silicon-material optical-electronic integration based on a simple and practicable fabrication method.
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影响因子:
1.5
作者:
I. Takahashi;Y. Hoshi;T. Tayagaki;T. Oikawa;K. Ohdaira;N. Usami
通讯作者:
I. Takahashi;Y. Hoshi;T. Tayagaki;T. Oikawa;K. Ohdaira;N. Usami
影响因子:
2.1
作者:
B. Pivac;I. Kovačević;P. Dubcek;N. Radic;S. Bernstorff;A. Slaoui
通讯作者:
B. Pivac;I. Kovačević;P. Dubcek;N. Radic;S. Bernstorff;A. Slaoui
影响因子:
4
作者:
Liu, HC;Gao, M;Fafard, S
通讯作者:
Fafard, S
DOI:
10.1103/physrevb.48.18203
发表时间:
1993-12
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
Drucker
通讯作者:
Drucker
影响因子:
2.5
作者:
K. Das;S. Das;R. Singha;S. Ray;A. Raychaudhuri
通讯作者:
K. Das;S. Das;R. Singha;S. Ray;A. Raychaudhuri