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Updated: Mar 15, 2026

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A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics
Published on: August 28, 2018
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Unlocking dual-function sensing via topological edge and corner states
Optics Letters
|March 13, 2026
Summary
This study introduces a dual-function sensor using topological corner states (TCSs) for simultaneous refractive index and temperature detection. This innovation advances multifunctional sensing for compact nanophotonic devices.
Area of Science:
- Photonics
- Condensed Matter Physics
- Materials Science
Background:
- Topological corner states (TCSs) offer localized energy and defect immunity, crucial for advanced applications.
- Existing TCS sensors are limited to single-function detection, hindering multifunctional capabilities.
Purpose of the Study:
- To develop a novel dual-function sensor leveraging TCSs for simultaneous detection of refractive index and temperature.
- To demonstrate a new paradigm for multifunctional sensing using composite photonic structures.
Main Methods:
- Proposed a dual-function sensor utilizing TCSs within a composite photonic structure.
- Achieved TCS excitation via near-field coupling assisted by topological edge states.
- Employed dual-band TCSs to enable sensing of refractive index and temperature.
Main Results:
- The sensor exhibited wavelength shifts in response to changes in refractive index and temperature.
- Achieved a salinity sensitivity of 0.04 THz/‰ and temperature sensitivity of 0.021 THz/°C.
- Demonstrated the feasibility of multifunctional sensing with high sensitivity.
Conclusions:
- Established a new paradigm for multifunctional sensing using TCSs.
- Paved the way for the development of ultra-compact on-chip nanophotonic devices.
- Highlighted the potential of TCSs in advancing integrated photonic systems.
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