Prakash Pitchappa

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We experimentally demonstrate a micromachined reconfigurable metamaterial with polarization independent characteristics for multiple resonances in terahertz spectral region. The metamaterial unit cell consists of eight out-of-plane deformable microcantilevers placed at each corner of an octagon ring. The octagon shaped unit cell geometry provides the(More)
We report an array of prestressed MEMS cantilever as active metamaterial for dynamic manipulation of terahertz waves. The electrostatically actuated microcantilevers integrated into split ring resonator and electrical split ring resonator unit cell, further enables active tuning of magnetic and electrical resonance, respectively. The actuation method of(More)
We present the design, simulation, and characterization of structurally reconfigurable metamaterials showing terahertz (THz) frequency switching with polarization-insensitive response. The metamaterial unit cell consists of an octagon ring with eight out-of-plane deformable cantilevers placed at each of its vertex. The polarization insensitive(More)
— We experimentally demonstrate the active manipulation of terahertz (THz) waves using a periodic array of electrostatically actuated subwavelength microelectromechanical system cantilevers, which effectively behave like a metamaterial. The design methodology for achieving desired ON-and OFF-state resonance frequencies through electromechanical optimization(More)
We report the first thermal study of a triple band plasmonic nanoantenna strongly coupled to a molecular mode at mid IR wavelength (MW IR). The hybrid plasmonic structure supports three spatially and spectrally variant resonances of which two are magnetic and one is dipolar in nature. A hybridized mode is excited by coupling the structure's plasmonic mode(More)
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