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5 papers
Plasmon induced transparency in graphene based terahertz metamaterials
Koijam Monika Devi, M. Islam, Dibakar R. Chowdhury +2
Plasmon induced transparency (PIT) effect in a terahertz graphene metamaterial is numerically and theoretically analyzed. The proposed metamaterial comprises of a pair of graphene…
Ultrafast Switching in Terahertz Metamaterials using Ion Implanted Silicon on Sapphire
Dibakar Roy Chowdhury, Ranjan Singh, Antoinette J. Taylor +1
We demonstrate ultrafast resonance switching of terahertz metamaterials through optical excitation of radiation damaged silicon placed in the gap of single split gap ring resonator…
Terahertz metamaterials for linear polarization conversion and anomalous refraction
Nathaniel K. Grady, Jane E. Heyes, Dibakar Roy Chowdhury +6
Polarization is one of the basic properties of electromagnetic waves conveying valuable information in signal transmission and sensitive measurements. Conventional methods for adva…
Impact of resonator geometry and its coupling with ground plane on ultrathin metamaterial perfect absorbers
Li Huang, Dibakar Roy Chowdhury, Suchitra Ramani +5
We investigate the impact of resonator geometry and its coupling with ground plane on the performance of metamaterial perfect absorbers. Using a cross-resonator as an example struc…
Experimental demonstration of terahertz metamaterial absorbers with a broad and flat high absorption band
Li Huang, Dibakar Roy Chowdhury, Suchitra Ramani +4
We present the design, numerical simulations and experimental measurements of THz metamaterial absorbers with a broad and flat absorption top both for transverse electric and trans…