Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 61: Photonics II

Q 61.3: Vortrag

Freitag, 21. März 2014, 14:30–14:45, UDL HS3038

Polarization control of quantum dot emission by chiral photonic crystal slabs — •Sergey Lobanov^1,2, Nikolay Gippius², Sergei Tikhodeev^1,2, Thomas Weiss³, Kuniaki Konishi^4,5, and Makoto Kuwata-Gonokami^4,5,6 — ¹M.V.Lomonosov Moscow State University, Moscow, Russia — ²A. M. Prokhorov General Physics Institute, Moscow, Russia — ³4th Physics Institute and Research Centers Scope,, University of Stuttgart, Stuttgart, Germany — ⁴Photon Science Center, The University of Tokyo, Tokyo, Japan — ⁵Core Research for Evolutional Science and Technology(CREST), Tokyo, Japan — ⁶Department of Physics, The University of Tokyo, Tokyo, Japan

We investigate theoretically the polarization properties of the emission from a layer of quantum dots placed inside chiral photonic crystal structure consisting of achiral materials in the absence of external magnetic field. The mirror symmetry of the local electromagnetic field is broken in this system due to the decreased symmetry of the chiral modulated layer. As a result, the radiation of randomly polarized quantum dots normal to the structure becomes partially circularly polarized. The sign and degree of circular polarization are determined by the geometry of the chiral modulated structure and depend on the radiation frequency. We show that the degree of circular polarization can reach up to 99% for randomly distributed quantum dots, and can be close to 100% for some single quantum dots.