G
George R. Keiser
Researcher at Washington College
Publications - 26
Citations - 1620
George R. Keiser is an academic researcher from Washington College. The author has contributed to research in topics: Terahertz radiation & Metamaterial. The author has an hindex of 13, co-authored 26 publications receiving 1322 citations. Previous affiliations of George R. Keiser include Brown University & Boston University.
Papers
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Journal ArticleDOI
Terahertz-field-induced insulator-to-metal transition in vanadium dioxide metamaterial
Mengkun Liu,Harold Y. Hwang,Hu Tao,Andrew C. Strikwerda,Kebin Fan,George R. Keiser,Aaron Sternbach,Kevin G. West,Salinporn Kittiwatanakul,Jiwei Lu,Stuart A. Wolf,Fiorenzo G. Omenetto,Xin Zhang,Keith A. Nelson,Richard D. Averitt +14 more
TL;DR: The observation of an insulator–metal transition in vanadium dioxide induced by a terahertz electric field is reported, demonstrating that integration of metamaterials with complex matter is a viable pathway to realize functional nonlinear electromagnetic composites.
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Optically Modulated Multiband Terahertz Perfect Absorber
Huseyin R. Seren,George R. Keiser,Lingyue Cao,Jingdi Zhang,Andrew C. Strikwerda,Kebin Fan,Grace D. Metcalfe,Michael Wraback,Xin Zhang,Richard D. Averitt +9 more
TL;DR: In this paper, photo-excited free carriers in silicon pads placed in the capacitive gaps of split ring resonators are designed and fabricated to operate in reflection, and large modulation depth (38% and 91%) in two absorption bands (with 97% and 92% peak absorption) is demonstrated.
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Frequency tunable terahertz metamaterials using broadside coupled split-ring resonators
Evren Ekmekci,Evren Ekmekci,Evren Ekmekci,Andrew C. Strikwerda,Kebin Fan,George R. Keiser,Xin Zhang,Gonul Turhan-Sayan,Richard D. Averitt +8 more
TL;DR: In this article, a broadside coupled split-ring resonator (BC-SRR) array was proposed for frequency tunable metamaterial designs at terahertz (THz) frequencies.
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Voltage-tunable dual-layer terahertz metamaterials
Xiaoguang Zhao,Kebin Fan,Kebin Fan,Jingdi Zhang,Jingdi Zhang,George R. Keiser,George R. Keiser,Guangwu Duan,Richard D. Averitt,Richard D. Averitt,Xin Zhang +10 more
TL;DR: The tunable metamaterial device has myriad potential applications, including terahertz spatial light modulation, phase modulation, and chemical sensing, and the scheme that is implemented can be scaled to operate at other frequencies, thereby enabling a wide range of distinct applications.
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Optically Tunable Terahertz Metamaterials on Highly Flexible Substrates
Kebin Fan,Xiaoguang Zhao,Jingdi Zhang,Kun Geng,George R. Keiser,Huseyin R. Seren,Grace D. Metcalfe,Michael Wraback,Xin Zhang,Richard D. Averitt +9 more
TL;DR: In this paper, the authors presented optically tunable metamaterials (MMs) on flexible polymer sheets operating at terahertz (THz) frequencies, consisting of electric split-ring resonators (eSRRs) on patterned GaAs patches.