Integrated, ultrafast all-optical polariton transistors
Pietro Tassan, Darius Urbonas, et al.
ICSCE 2024
We study circular grating resonators (CGRs) which are formed by a central defect surrounded by concentric rings composing a grating and which display perfect azimuthal modal-symmetry. Because of their radial symmetry they exhibit a complete band gap for a minimal index contrast. However, as is the case for all 2D resonators their quality factors are limited by vertical losses. To reduce the vertical losses we introduce a chirp of the grating period by reducing it towards the central defect. The chirped CGRs exhibit drastically improved quality factors of up to tens of millions with a modal volume of a few cubic wavelengths. © 2009 Optical Society of America.
Pietro Tassan, Darius Urbonas, et al.
ICSCE 2024
Rafal Mirek, Darius Urbonas, et al.
PEPS 2024
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Nature Nanotechnology
Etsuki Kobiyama, Gabriele Rainò, et al.
MRS Fall Meeting 2022