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Proceedings Paper

Adaptive phase change metamaterials for infrared aperture control
Author(s): Douglas H. Werner; Theresa S. Mayer; Clara Rivero-Baleine; Nikolas Podraza; Kathleen Richardson; Jeremy Turpin; Alexej Pogrebnyakov; J. David Musgraves; Jeremy A. Bossard; Hee Jung Shin; Robert Muise; Stanley Rogers; Jeremy D. Johnson
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Paper Abstract

This paper discusses the use of chalcogenide phase change materials to create tunable metamaterials as potential candidates for application to adaptive coded aperture control in the infrared. Phase change materials exhibit large and reversible changes in optical properties (Δn, Δk) when switched between the amorphous and crystalline phases. Thermally-induced phase transitions from the insulating amorphous to the conductive crystalline state can be controlled through external means, facilitating the design of reconfigurable metamaterial devices that operate with ultrafast response times. In this work, robust global stochastic optimization algorithms were combined with full-wave electromagnetic simulation tools to design periodic subwavelength chalcogenide nanostructured arrays to meet the specified device performance goals in each phase. The measured optical properties (n, k) of deposited chalcogenide thin films and nanofabrication constraints were incorporated into the optimization algorithm to guarantee that the designed nanostructures could be manufactured. By choosing the appropriate cost functions, adaptive metamaterials were designed to switch between transmissive and reflective, transmissive and absorptive, and reflective and absorptive states. These design demonstrations represent a significant step forward in the development of adaptive infrared metamaterials.

Paper Details

Date Published: 8 September 2011
PDF: 9 pages
Proc. SPIE 8165, Unconventional Imaging, Wavefront Sensing, and Adaptive Coded Aperture Imaging and Non-Imaging Sensor Systems, 81651H (8 September 2011); doi: 10.1117/12.894892
Show Author Affiliations
Douglas H. Werner, The Pennsylvania State Univ. (United States)
Theresa S. Mayer, The Pennsylvania State Univ. (United States)
Clara Rivero-Baleine, Lockheed Martin Missile and Fire Control (United States)
Nikolas Podraza, The Pennsylvania State Univ. (United States)
Univ. of Toledo (United States)
Kathleen Richardson, Clemson Univ. (United States)
Jeremy Turpin, The Pennsylvania State Univ. (United States)
Alexej Pogrebnyakov, The Pennsylvania State Univ. (United States)
J. David Musgraves, Clemson Univ. (United States)
Jeremy A. Bossard, The Pennsylvania State Univ. (United States)
Hee Jung Shin, The Pennsylvania State Univ. (United States)
Robert Muise, Lockheed Martin Missiles and Fire Control (United States)
Stanley Rogers, Air Force Research Lab. (United States)
Jeremy D. Johnson, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 8165:
Unconventional Imaging, Wavefront Sensing, and Adaptive Coded Aperture Imaging and Non-Imaging Sensor Systems
Stanley Rogers; Jean J. Dolne; David P. Casasent; Thomas J. Karr; Victor L. Gamiz, Editor(s)

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