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Related Experiment Video

Updated: Jul 24, 2025

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface

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Published on: May 8, 2021

Multiple Physical Quantities Janus Metastructure Sensor Based on PSHE.

Junyang Sui¹, Jie Xu¹, Aowei Liang¹

¹College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China.

Sensors (Basel, Switzerland)

|July 11, 2023

Summary

This summary is machine-generated.

This study introduces a Janus metastructure sensor (JMS) utilizing the photonic spin Hall effect (PSHE) for versatile physical quantity detection. The sensor demonstrates enhanced accuracy and broader detection ranges across multiple scales.

Keywords:

Janus metastructure metastructure photonic spin Hall effect physical quantities detection

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Area of Science:

Metamaterials and Nanophotonics
Optical Sensing Technologies
Condensed Matter Physics

Background:

Traditional sensors often have single-function limitations.
Asymmetric structures can break parity, enabling unique physical properties.
The photonic spin Hall effect (PSHE) offers potential for spin-dependent light manipulation.

Purpose of the Study:

To propose and demonstrate a multifunctional Janus metastructure sensor (JMS).
To leverage the photonic spin Hall effect (PSHE) for enhanced sensing capabilities.
To enable detection of multiple physical quantities with improved accuracy and range.

Main Methods:

Design of a Janus metastructure with asymmetric dielectric arrangement.
Utilizing the photonic spin Hall effect (PSHE) for enhanced displacement peaks via graphene.
Analyzing electromagnetic wave (EW) incidence from both forward and backward directions.

Main Results:

The JMS successfully detects refractive index, thickness, and incidence angle.
Forward incidence: detection ranges of 2–2.4 (RIU), 2–2.35 μm (thickness), 27°–47° (angle) with sensitivities of 81.35°/RIU, 64.84°/μm, 0.02238 THz/°.
Backward incidence: detection ranges of 2–2.09 (RIU), 1.85–2.02 μm (thickness), 20°–40° (angle) with sensitivities of 99.3°/RIU, 70.07°/μm, 0.02348 THz/°.

Conclusions:

The Janus metastructure sensor (JMS) offers multifunctional sensing capabilities.
The sensor exhibits distinct sensing properties for forward and backward electromagnetic wave incidence.
This JMS presents a promising alternative to single-function sensors for diverse applications.