Title :
Ultra-fast spinor switching in polariton condensates
Author :
Askitopoulos, A. ; Ohadi, H. ; Liew, T.C.H. ; Hatzopoulos, Z. ; Savvidis, P.G. ; Kavokin, A.V. ; Lagoudakis, P.G.
Author_Institution :
Sch. of Phys. & Astron., Univ. of Southampton, Southampton, UK
Abstract :
We demonstrate a linear to circular polarization conversion mechanism of a confined polariton condensate created by an optical potential trap. This system features a high degree of circular polarization under linear polarization pumping and is favorable for the development of spin logic operations. The physical mechanism behind this process is explained by the spin precession in the exciton reservoir that results in a condensate of a preferred spin state. Application of a non-resonant below threshold femtosecond pulse on the spinor condensate results in an ultrafast reversal of the spin state.
Keywords :
high-speed optical techniques; light polarisation; optical pumping; optical switches; polaritons; confined polariton condensate; exciton reservoir; linear polarization pumping; linear-circular polarization conversion; nonresonant below threshold femtosecond pulse; optical potential trap; physical mechanism; spin logic operations; spin precession; spin state; ultra-fast spinor switching; ultrafast reversal; Optical polarization; Optical pulses; Optical pumping; Optical switches; Polarization; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2014 Conference on
Conference_Location :
San Jose, CA
