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Lorentzian dispersive antireflection temporal coatings with multiple time durations.

Fanghu Feng, Neng Wang, Guo Ping Wang

|August 15, 2023

Summary

Antireflection temporal coatings (ATCs) using Lorentzian dispersive media offer new possibilities for eliminating reflections. These coatings provide diverse time durations and enhanced transmission, even in gigahertz and terahertz frequencies.

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Area of Science:

Optics and Photonics
Electromagnetism
Materials Science

Background:

Traditional antireflection coatings manage optical reflections at interfaces.
Antireflection temporal coatings (ATCs) offer a dynamic approach using two-step temporal modulations.
Understanding the role of material dispersion in ATCs is crucial for advanced applications.

Purpose of the Study:

To investigate antireflection temporal coatings (ATCs) employing Lorentzian dispersive media.
To analyze the impact of dispersion on ATC time durations and transmission characteristics.
To explore the potential for enhanced transmission and novel reflection elimination mechanisms.

Main Methods:

Utilized an extended temporal transfer matrix method for analysis.
Explored ATCs with Lorentzian dispersive media.
Investigated the influence of varying time durations and material parameters.

Main Results:

Lorentzian dispersive ATCs exhibit diverse time durations, often shorter than nondispersive counterparts.
Accidental reflection elimination is achievable by tuning parameters, a capability absent in nondispersive ATCs.
Enhanced transmission is observed in certain configurations, surpassing nondispersive ATCs.

Conclusions:

Lorentzian dispersive ATCs provide additional temporal duration options compared to nondispersive ones.
These coatings offer tunable transmission characteristics and the potential for transmission enhancement.
The findings are relevant for applications in the gigahertz and terahertz frequency regimes.