Control of optical bistability and third-order nonlinearity via tunneling induced quantum interference in triangular quantum dot molecules

The optical bistability of a triangular quantum dot molecules embedded inside a unidirectional ring cavity is studied. The type, the threshold and the hysteresis loop of the optical bistability curves can be modified by the tunneling parameters, as well as the probe laser field. The linear and nonli...

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Bibliographic Details
Published in:AIP advances 2015-06, Vol.5 (6), p.067144-067144-10
Main Authors: Tian, Si-Cong, Wan, Ren-Gang, Tong, Cun-Zhu, Zhang, Jin-Long, Shan, Xiao-Nan, Fu, Xi-Hong, Zeng, Yu-Gang, Qin, Li, Ning, Yong-Qiang
Format: Article
Language:English
Subjects:
DIAGRAMS
HYSTERESIS
Hysteresis loops
INTERFERENCE
LASER RADIATION
MOLECULES
NANOSCIENCE AND NANOTECHNOLOGY
NONLINEAR PROBLEMS
Nonlinear response
Nonlinearity
Optical bistability
Optical switching
OPTIMIZATION
Parameter modification
PROBES
QUANTUM DOTS
TUNNEL EFFECT
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Summary:The optical bistability of a triangular quantum dot molecules embedded inside a unidirectional ring cavity is studied. The type, the threshold and the hysteresis loop of the optical bistability curves can be modified by the tunneling parameters, as well as the probe laser field. The linear and nonlinear susceptibilities of the medium are also studied to interpret the corresponding results. The physical interpretation is that the tunneling can induce the quantum interference, which modifies the linear and the nonlinear response of the medium. As a consequence, the characteristics of the optical bistability are changed. The scheme proposed here can be utilized for optimizing and controlling the optical switching process.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4922959