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Programmable nanophotonic planar resonator filter-absorber based on phase-change InSbTe
Israel Alves Oliveira1, I L Gomes de Souza2, V F Rodriguez-Esquerre3
1Graduate School of Electrical Engineering, Federal University of Bahia, Salvador, 40155-250, Brazil. israel.alves@ufba.br.
Scientific Reports
|August 14, 2023
Summary
This study introduces a reconfigurable plasmonic-photonic resonator using phase-change materials (PCM). The device efficiently switches between filter and absorber functionalities in the infrared spectrum, demonstrating its potential for advanced optical modulation.
Area of Science:
- Photonics
- Materials Science
- Electromagnetics
Background:
- Reconfigurable plasmonic-photonic devices are crucial for optical modulation.
- Chalcogenide phase-change materials (PCM) offer unique electrical and optical properties for photonic applications.
Purpose of the Study:
- To propose and numerically analyze a novel reconfigurable resonator.
- To demonstrate the device's ability to function as both a filter and an absorber.
- To investigate the impact of material thickness and polarization on device performance.
Main Methods:
- Numerical design and analysis using the Finite Element Method (FEM).
- Utilized a Metal-dielectric-PCM stacked ultrathin film structure.
- Investigated the modulation between amorphous and crystalline PCM phases.
Main Results:
- Achieved >70% efficiency for both filter and absorber functionalities in the 1000-2500 nm IR spectrum.
- Analyzed the influence of material thickness for manufacturing tolerances and dynamic control.
- Investigated field coupling, power density, and polarization effects (TE and TM).
Conclusions:
- The proposed Metal-dielectric-PCM resonator offers efficient and reconfigurable optical modulation.
- The design demonstrates practical potential for tunable infrared photonic devices.
- Phase-change materials are key enablers for advanced, dynamically controlled optical functionalities.
