Circularly-Polarized Light Emission from Semiconductor Planar Chiral Photonic Crystal

Details Circularly-Polarized Light Emission from Semiconductor Planar Chiral Photonic Crystal Circularly-Polarized Light Emission from Semiconductor Planar Chiral Photonic Crystal

2010-01-30

arxiv.org/abs/1002.0044v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

REVTeX4.1, 6pages, 3figures

Scientific paper

We proposed and demonstrated a scheme of surface emitting circularly polarized light source by introducing strong imbalance between left- and right-circularly polarized vacuum fields in an on-waveguide chiral grating structure. We observed circularly polarized spontaneous emission from InAs quantum dots embedded in the wave guide region of a GaAs-based structure. Obtained degree of polarization reaches as large as 25% at room temperature. Numerical calculation visualizes spatial profiles of the modification of vacuum field modes inside the structure with strong circular anisotropy.

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