Email this article Towards -Symmetric Optical Dimer Fabrication without a Light-Absorbing Material
- Authors: Dmitriev A.A1, Baryshnikova K.V1, Rybin M.V2
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Affiliations:
- School of Physics and Engineering, ITMO University, 197101, St. Petersburg, Russia
- Ioffe Institute, 194021, St. Petersburg, Russia
- Issue: Vol 117, No 11-12 (6) (2023)
- Pages: 808-813
- Section: Articles
- URL: https://journals.rcsi.science/0370-274X/article/view/145226
- DOI: https://doi.org/10.31857/S1234567823110022
- EDN: https://elibrary.ru/DINFSX
- ID: 145226
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Abstract
We consider an approach to engineer an optical dimer of particles operating in the spectral region near the dipolar resonance that exhibits parity–time symmetry-like features. Both particles are assumed to be made of a gain medium with the same refractive index and extinction coefficient. We suggest introducing a gain–loss contrast by altering the radiative loss of the particles through changing their shape. To demonstrate our approach, we consider a dimer of infinite filled and hollow cylinders. We demonstrate that a larger hollow diameter leads to a stronger radiative decay. Then we find the parameters of a dimer that has an exceptional point at a real frequency and exhibits two real eigenfrequencies when the gain–loss contrast is decreased.
About the authors
A. A Dmitriev
School of Physics and Engineering, ITMO University, 197101, St. Petersburg, Russia
Email: alexey.dmitriev@metalab.ifmo.ru
K. V Baryshnikova
School of Physics and Engineering, ITMO University, 197101, St. Petersburg, Russia
Email: alexey.dmitriev@metalab.ifmo.ru
M. V Rybin
Ioffe Institute, 194021, St. Petersburg, Russia
Author for correspondence.
Email: alexey.dmitriev@metalab.ifmo.ru
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