Towards -Symmetric Optical Dimer Fabrication without a Light-Absorbing Material

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...

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Bibliographic Details
Published in:JETP letters 2023, Vol.117 (11), p.804-809
Main Authors: Dmitriev, A. A., Baryshnikova, K. V., Rybin, M. V.
Format: Article
Language:English
Subjects:
Atomic
Biological and Medical Physics
Biophysics
Dimers
Electromagnetic absorption
Gain-Loss
Molecular
Optical and Plasma Physics
Optics and Laser Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Information Technology
Refractivity
Resonant frequencies
Solid State Physics
Spintronics
Symmetry
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Summary: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.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364023600945