Epsilon-near-zero Resonance Excitation in AZO nano-coated Optical Fiber Waveguide
ORAL
Abstract
We experimentally demonstrate a novel optical waveguide design of side-polished fiber coated with a nano-film of aluminum-doped zinc oxide (AZO). The flat platform of the side-polished fiber is provided by etching/polishing out the cladding of a conventional single mode fiber apart from the doped core. AZO nano-films with epsilon-near-zero (ENZ) wavelength (real part of permittivity of the material crosses zero) at telecommunication wavelengths are fabricated onto the D-shaped platform by atomic layer deposition. Due to the evanescent field coupling between the optical fiber core mode and the modes supported by the AZO nano-layer, a highly confined ENZ mode in the AZO nano-film on the D-shaped platform could be excited. Furthermore, we investigate the polarization-dependent ENZ mode coupling properties with ambient refractive indices. Our results show the first experimental demonstration on the excitation of highly confined ENZ mode on optical fibers. These hybrid ENZ-optical fibers have potential applications for zero-index photonics, for instance, for studying enhanced nonlinear ENZ effects in fiber, quantum emission in ENZ media, and subwavelength mode in-fiber optical- and bio-sensing.
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Presenters
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Jingyi Yang
Department of Physics and Baylor Research and Innovation Collaborative (BRIC), Baylor University, Waco, TX 76798, United States
Authors
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Jingyi Yang
Department of Physics and Baylor Research and Innovation Collaborative (BRIC), Baylor University, Waco, TX 76798, United States
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Aleksei Anopchenko
Department of Physics and Baylor Research and Innovation Collaborative (BRIC), Baylor University, Waco, TX 76798, United States, Department of Physics and Baylor Research and, Baylor University, Department of Physics, Baylor University, One Bear Place #97316, Waco, TX 76798, Department of Physics, Baylor University, Waco, TX 76798, United States
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Sudip Gurung
Department of Physics and Baylor Research and Innovation Collaborative (BRIC), Baylor University, Waco, TX 76798, United States, Baylor University, Department of Physics, Baylor University, Waco, TX 76798, United States
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Khant Minn
Baylor Univ, Department of Physics and Baylor Research and Innovation Collaborative (BRIC), Baylor University, Waco, TX 76798, United States
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Subhajit Bej
Department of Physics and Baylor Research and Innovation Collaborative (BRIC), Baylor University, Waco, TX 76798, United States, Department of Physics, Baylor University, One Bear Place #97316, Waco, TX 76798, Department of Physics, Baylor University, Waco, TX 76798, United States
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Howard Ho Wai Lee
Baylor Univ, Texas A&M Univ, Department of Physics and Baylor Research and Innovation Collaborative (BRIC), Baylor University, Waco, TX 76798, United States, The Institute for Quantum Science and Enginee, Baylor University, Department of Physics, Baylor University, One Bear Place #97316, Waco, TX 76798, Institute for Quantum Science and Engineering, Texas A&M University, College Station, TX 778, Department of Physics, Baylor University, Waco, TX 76798, United States, The Institute for Quantum Science and Engineering, Texas A&M University College Station, TX 77843, Un