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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Published on: July 8, 2013

Active digital spoof plasmonics.

Hao Chi Zhang^1,2, Tie Jun Cui¹, Yu Luo²

¹State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.

National Science Review

|October 25, 2021

Summary

This summary is machine-generated.

Researchers developed a tunable plasmonic metasurface for digital control of surface plasmons. This breakthrough enables precise amplitude and phase modulation at the deep-subwavelength scale, advancing integrated plasmonic circuits.

Keywords:

digital coding digital metamaterials digital modulation plasmonics

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Area of Science:

Metamaterials and Plasmonics
Information Science and Technology

Background:

Digital coding and modulation are fundamental to information science.
Metamaterials offer advanced control over electromagnetic waves, but controlling light at the subwavelength scale in plasmonics remains challenging.

Purpose of the Study:

To design and experimentally realize a tunable conformal plasmonic metasurface.
To achieve digital coding and modulation of designer surface plasmons at the deep-subwavelength scale.

Main Methods:

Dynamical switching between two discrete dispersion states.
Utilizing a tunable conformal plasmonic metasurface for active dispersion engineering.

Main Results:

Achieved digital modulation of both amplitude and phase of surface waves.
Demonstrated nearly 100% modulation depth on a single device for surface plasmons.
Extended digital control capabilities from free-space light to subwavelength plasmonic fields.

Conclusions:

Introduced a novel approach for active dispersion engineering in plasmonics.
Paved the way for subwavelength integrated plasmonic circuits with digital control.
Enabled precise manipulation of surface plasmons at the deep-subwavelength scale.