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

Hossein Asadpour, S ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1016/j.physe.2011.04.024
  3. Publisher: 2011
  4. Abstract:
  5. 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
  6. Keywords:
  7. Double quantum dots ; Kerr nonlinearity ; Linear absorption ; Long wavelength ; Nonlinear absorptions ; Quantum dot nanostructures ; Tunnel coupling ; Absorption ; Electron tunneling ; Semiconductor quantum dots ; Optical Kerr effect
  8. Source: Physica E: Low-Dimensional Systems and Nanostructures ; Volume 43, Issue 10 , August , 2011 , Pages 1759-1762 ; 13869477 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1386947711001585