Enhancement of Kerr nonlinearity at long wavelength in a quantum dot nanostructure

被引：56

作者：

Asadpour, Seyyed Hossein ^{[1
,2
,3
]}

Sahrai, Mostafa ^{[2
]}

Sadighi-Bonabi, Rasoul ^{[3
]}

Soltani, Amir

Mahrami, Hamed

机构：

[1] Engn Fac Bonab, Opt & Laser Grp, Dept Phys, Bonab, Iran

[2] Univ Tabriz, Res Inst Appl Phys & Astron, Tabriz, Iran

[3] Sharif Univ Technol, Dept Phys, Tehran, Iran

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2011年 / 43卷 / 10期

关键词：

D O I：

10.1016/j.physe.2011.04.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The giant Kerr nonlinearity with reduced linear and nonlinear absorption in a four-level quantum dot by employing the tunnel coupling is investigated. It is shown that by enhancement of tunnel coupling value the Kerr nonlinearity increases and at the same time linear and nonlinear absorption reduces at the long wavelength which is very important for communicational applications. Enhanced of Kerr nonlinearity in a double quantum dots is investigated. It is found that the electron tunneling has an essential role to reducing the linear absorption and increasing the Kerr nonlinearity at long wavelength. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1759 / 1762

页数：4

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