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Dispersion coding of ENZ media via multiple photonic dopants
Ziheng Zhou1, Hao Li1, Wangyu Sun1
1Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China.
Light, Science & Applications
|July 6, 2022
Summary
Epsilon-near-zero (ENZ) media with multiple dopants enable novel wave phenomena. This study introduces dispersion coding using photonic dopants to program ENZ media for reconfigurable frequency combs and advanced applications.
Area of Science:
- * Metamaterials and Nanophotonics
- * Electromagnetics and Wave Phenomena
Background:
- * Epsilon-near-zero (ENZ) media exhibit unique wave properties.
- * Controlling dispersion in ENZ materials is crucial for advanced applications.
Purpose of the Study:
- * To demonstrate comb-like dispersion in ENZ media with multiple dielectric photonic dopants.
- * To introduce and validate the concept of dispersion coding for programming ENZ spectral responses.
Main Methods:
- * Fabrication of a compact multi-doped ENZ cavity.
- * Experimental characterization of the cavity's transmission spectrum.
- * Theoretical analysis of magnetic resonances and dopant independence.
Main Results:
- * Achieved comb-like dispersion of effective permeability, with resonances tied to individual dopants.
- * Demonstrated independent magnetic resonances for multiple dopants in the ENZ host.
- * Experimentally realized a multi-bit reconfigurable frequency comb in the transmission spectrum.
Conclusions:
- * Multiple dopants in ENZ media enable independent control over magnetic resonances.
- * Dispersion coding offers a novel method to program spectral responses.
- * The developed platform supports innovative applications like tunable filters and RFID tags.
