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A Mid-Infrared Multifunctional Optical Device Based on Fiber Integrated Metasurfaces
Weikang Yao1,2, Qilin Zhou1,2, Chonglu Jing1,2
1The School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430074, China.
Nanomaterials (Basel, Switzerland)
|September 9, 2023
Summary
We developed a novel mid-infrared optical device by integrating metasurfaces with hollow core anti-resonant fibers. This device enables tunable sensing and modulation, with applications in lasers, biomedicine, and gas detection.
Area of Science:
- Optoelectronics and Nanophotonics: Focus on metasurface applications in the mid-infrared spectrum.
Background:
- Metasurfaces offer precise control over electromagnetic waves due to their subwavelength structure.
- Integrating optical fibers with metasurfaces creates versatile and flexible optical devices.
Purpose of the Study:
- To propose and demonstrate a novel fiber-integrated metasurface device for mid-infrared applications.
- To achieve transmissive modulation and refractive index sensing using metasurfaces within a hollow core fiber.
Main Methods:
- Utilized a hollow core anti-resonant fiber (HC-ARF) to confine mid-infrared light.
- Designed and integrated bilayer metasurfaces at the fiber end face for optical field modulation.
- Incorporated a polydimethylsiloxane (PDMS) layer for temperature-tunable functionality.
Main Results:
- Demonstrated transmissive modulation of optical fields emitted from the HC-ARF.
- Achieved high-sensitivity refractive index (RI) sensing with a high figure of merit (FOM) via Fano resonance.
- Showcased temperature-tunable optical functions through the PDMS layer.
Conclusions:
- Presented an integrated, multifunctional optical device for the mid-infrared band.
- The device shows significant potential for applications in high-power lasers, laser biomedicine, and trace gas detection.
