首页|Chiral polaritons in semiconductor perovskite metasurface enhanced by bound states in the continuum
Chiral polaritons in semiconductor perovskite metasurface enhanced by bound states in the continuum
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Chiral polaritons in semiconductor perovskite metasurface enhanced by bound states in the continuum
The exploration of novel chiral optical platforms holds both fundamental and practical importances,which have shown great promise towards applications in valleytronics,chiral sensing and nanoscopic chiroptics.In this work,we combine two key concepts—chiral bound states in the continuum and exciton polaritons—to showcase a strong chiral response from polaritons.Using the finite element method,we numerically design a CsPbBr3 based metasurface that supports intrinsically chiral bound states in the continuum and verify the chirality by calculating the reflection spectrum and eigen-polarization mapping.We further demonstrate chirality-dependent exciton polariton angular dispersion arising from the strong coupling between the chiral BIC and excitons in CsPbBr3 by simulating the polariton angle-resolved absorption spectrum.Reciprocity analysis reveals that the polariton photoluminescence in different momentum space locations is selectively enhanced by chiral pumping light.Our results suggest a promising first step towards chiral polaritonics.
bound states in the continuumchiralitymetasurfaceperovskite microcavitiesexciton polariton
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