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Temperature-Controlled Chameleonlike Cloak

TitleTemperature-Controlled Chameleonlike Cloak
Publication TypeJournal Article
Year of Publication2017
AuthorsPeng, RG, Xiao, ZQ, Zhao, Q, Zhang, FL, Meng, YG, Li, B, Zhou, J, Fan, YC, Zhang, P, Shen, NH, Koschny, T, Soukoulis, CM
JournalPhysical Review X
Date Published03
Type of ArticleReview
ISBN Number2160-3308
Accession NumberWOS:000397445900001
Keywordsmetamaterials, physics

Invisibility cloaking based on transformation optics has brought about unlimited space for reverie. However, the design and fabrication of transformation-optics-based cloaks still remain fairly challenging because of the complicated, even extreme, material prescriptions, including its meticulously engineered anisotropy, inhomogeneity and singularity. And almost all the state-of-the-art cloaking devices work within a narrow and invariable frequency band. Here, we propose a novel mechanism for all-dielectric temperature-controllable cloaks. A prototype device was designed and fabricated with SrTiO 3 ferroelectric cuboids as building blocks, and its cloaking effects were successfully demonstrated, including its frequency-agile invisibility by varying temperature. It revealed that the predesignated cloaking device based on our proposed strategy could be directly scaled in dimensions to operate at different frequency regions, without the necessity for further efforts of redesign. Our work opens the door towards the realization of tunable cloaking devices for various practical applications and provides a simple strategy to readily extend the cloaking band from microwave to terahertz regimes without the need for reconfiguration.

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Alternate JournalPhys. Rev. X