Demonstration of wideband tunability in chalcogenide metamaterials

J. A. Frantz; J. D. Myers; A. Clabeau; R. Y. Bekele; A. F. Moore; V. Q. Nguyen; C. L. McGinnis; J. S. Sanghera

doi:10.1117/12.3000248

13 March 2024 Demonstration of wideband tunability in chalcogenide metamaterials

J. A. Frantz, J. D. Myers, A. Clabeau, R. Y. Bekele, A. F. Moore, V. Q. Nguyen, C. L. McGinnis, J. S. Sanghera

Proceedings Volume 12896, Photonic and Phononic Properties of Engineered Nanostructures XIV; 1289604 (2024) https://doi.org/10.1117/12.3000248
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Active tuning has long been a goal for photonic metamaterial devices. Several approaches have succeeded in providing active tuning. These include mechanical deformation, the incorporation of an active liquid crystal layer, electrically induced permittivity modulation, and the use of phase change materials. In this presentation, we describe a novel method of tuning the resonance of a metamaterial in which an optically transparent thin film, referred to here as a “shifter,” is placed in proximity to a dielectric metasurface. The spacing between the metasurface and the shifter is carefully controlled by a piezoelectric transducer. Device designs for the midwave infrared (MWIR) based on chalcogenide glass films are presented. Modelling shows a tuning range of approximately 500 nm in the MWIR for a change in shifter spacing of approximately 700 nm. It is shown that the size and shape of the field at an individual resonator changes significantly based on shifter spacing, resulting in a large tuning range. The piezo shifting method described here represents a new technique for tuning the resonance of a metasurface over a large-area with a large tuning range.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

J. A. Frantz, J. D. Myers, A. Clabeau, R. Y. Bekele, A. F. Moore, V. Q. Nguyen, C. L. McGinnis, and J. S. Sanghera "Demonstration of wideband tunability in chalcogenide metamaterials", Proc. SPIE 12896, Photonic and Phononic Properties of Engineered Nanostructures XIV, 1289604 (13 March 2024); https://doi.org/10.1117/12.3000248

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