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1. (WO2007014483) METHOD AND DEVICE FOR POLARIZATION CONVERSION USING QUANTUM DOTS

Pub. No.:    WO/2007/014483    International Application No.:    PCT/CH2006/000407
Publication Date: Fri Feb 09 00:59:59 CET 2007 International Filing Date: Sat Aug 05 01:59:59 CEST 2006
IPC: G02F 1/01
G02B 5/30
G02F 1/017
Applicants: ETECH AG
MOLENKAMP, Laurens, W.
ASTAKHOV, Georgy
OSSAU, Wolfgang
KRESSLING, Tobias
PLATONOV, Alexei
Inventors: MOLENKAMP, Laurens, W.
ASTAKHOV, Georgy
OSSAU, Wolfgang
KRESSLING, Tobias
PLATONOV, Alexei
Title: METHOD AND DEVICE FOR POLARIZATION CONVERSION USING QUANTUM DOTS
Abstract:
A novel and efficient method for polarization conversion, particularly from linear polarization to circular polarization, and, importantly, vice versa, is obtained using shapeanisotropic self-assembled quantum dots, which, having the advantage of extremely small size (nanometer scale), may be readily incorporated into photonic crystals and/or other optical components. Such devices also have the advantage of working in the absence of an applied magnetic field. Such devices also, when a voltage bias is applied, can be used to manipulate electron spin by manipulating light polarization in the same circuit, and vice versa. This permits a high degree of control for either or both of these in spintronics and/or optical devices, the biased quantum dot being used as a nanometer scale electro-optic modulator. Components utilizing the method and/or devices may be used as part of highly compact optical computing networks and/or spintronics systems for e.g., information processing, quantum computation, holography, and data recording.