Linear and nonlinear optical susceptibilities in a laterally coupled quantum-dot–quantum-ring system

2014 ◽  
Vol 378 (36) ◽  
pp. 2713-2718 ◽  
Author(s):  
Zaiping Zeng ◽  
Christos S. Garoufalis ◽  
Sotirios Baskoutas
Keyword(s):  
Quantum Dot ◽  
Nonlinear Optical ◽  
Ring System ◽  
Quantum Ring ◽  
Linear And Nonlinear

NONLINEAR OPTICAL PROPERTIES OF THE WURTZITE InGaN/AlGaN PARABOLIC QUANTUM DOT

NANO ◽  
2013 ◽  
Vol 08 (02) ◽  
pp. 1350019 ◽  
Author(s):  
TAIRONG CHEN ◽  
WENFANG XIE ◽  
SHIJUN LIANG
Keyword(s):  
Optical Properties ◽  
Quantum Dot ◽  
Nonlinear Optical ◽  
Significant Contribution ◽  
Nonlinear Optical Properties ◽  
Mass Approximation ◽  
Nonlinear Optical Absorption ◽  
Sphere Radius ◽  
Linear And Nonlinear ◽  
Direction Opposite

The linear and nonlinear optical properties in a wurtzite In x Ga 1-x N / Al y Ga 1-y N strained spherical quantum dot (QD) subjected to a uniform external electric field with a direction opposite to that of the built-in electric (BEF) within the framework of effective-mass approximation have been investigated. The results show that the BEF has great effects on the linear and nonlinear optical absorption coefficients (ACs) and refractive index (RI) changes. Moreover, the dependence of the linear and nonlinear optical properties on the In composition, on the Al composition and on the inner sphere radius has been studied in detail. It is indicated that the ACs and RI changes of the Wurtzite spherical QD have strongly affected by these factors. The results may make a significant contribution to designing some important photodetectors and photonic crystal devices.

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