On-chip synthesis of circularly polarized emission of light with integrated photonic circuits

Li He, Mo Li

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The helicity of circularly polarized (CP) light plays an important role in the light-matter interaction in magnetic and quantum material systems. Exploiting CP light in integrated photonic circuits could lead to on-chip integration of novel optical helicity-dependent devices for applications ranging from spintronics to quantum optics. In this Letter, we demonstrate a silicon photonic circuit coupled with a 2D grating emitter operating at a telecom wavelength to synthesize vertically emitting, CP light from a quasi-TE waveguide mode. Handedness of the emitted circular polarized light can be thermally controlled with an integrated microheater. The compact device footprint enables a small beam diameter, which is desirable for large-scale integration.

Original languageEnglish (US)
Pages (from-to)2553-2556
Number of pages4
JournalOptics Letters
Volume39
Issue number9
DOIs
StatePublished - May 1 2014

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