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Controlled Dispersion and Transmission-Absorption of Optical Energy through Scaled Metallic Plate Structures
Hammou Oubeniz1, Abdelhaq Belkacem1, Hicham Mangach2
1Laboratory of Optics, Information Processing, Mechanics, Energetics and Electronics, Department of Physics, Moulay Ismail University, Zitoune, Meknes B.P. 11201, Morocco.
Materials (Basel, Switzerland)
|September 28, 2023
Summary
This study investigates how scaling parameters affect optical transmission and absorption in plasmonic nanostructures. Findings reveal insights into dispersive properties crucial for near-infrared to visible light applications.
Area of Science:
- Plasmonics
- Optical Metamaterials
- Nanophotonics
Background:
- Metals exhibit unique dispersive properties at higher frequencies, enabling plasmonic applications.
- Extraordinary Optical Transmission (EOT) offers novel methods for manipulating optical energies.
- Understanding nanostructure scaling is key to controlling light-matter interactions.
Purpose of the Study:
- To analyze the impact of scaling parameters on transmission and absorption.
- To explore optical properties across the near-infrared to visible spectrum.
- To investigate the dispersive characteristics derived from slit resonance frequencies.
Main Methods:
- Rigorous Coupled Wave Analysis (RCWA) for analytical modeling.
- Finite Elements Method (FEM) for numerical simulations.
- Comparison of analytical and numerical results for validation.
Main Results:
- The scaling parameter significantly influences transmission and absorption spectra.
- Dispersive properties are directly linked to the resonance frequency of nanostructure slits.
- Excellent agreement was achieved between RCWA and FEM simulations.
Conclusions:
- Scaling parameters are critical for tuning optical responses in plasmonic nanostructures.
- The study provides a validated framework for understanding light transmission and absorption.
- This research contributes to the design of advanced optical devices operating from NIR to visible frequencies.
