Ultracompact, dynamically controllable circularly polarized laser enabled by chiral metasurfaces
arxiv(2024)
Abstract
We demonstrate a simple, low-cost and ultracompact chiral resonant
metasurface design, which, by strong local coupling to a quantum gain medium
(quantum emitters), allows to implement an ultra-thin metasurface laser,
capable of generating tunable circularly polarized coherent lasing output.
According to our detailed numerical investigations the lasing emission can be
transformed from linear to circular and switch from right- to left-handed
circularly polarized (CP) not only by changing the metasurface chiral response
but also by changing the polarization of a linearly polarized pump wave,
providing thus dynamic lasing-polarization control. Given the increasing
interest for CP laser emission, our chiral metasurface laser design proves to
be a versatile yet straightforward strategy to generate strong and tailored CP
emission laser, promising great potential for future applications in both
photonics and materials science.
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