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We demonstrate an ErAs:InGaAs photomixer that incorporates plasmonic contact electrodes to enhance device quantum efficiency and, thus, offers significantly higher radiation power levels compared to previously demonstrated photomixer designs pumped at 1.55 um wavelength range.
We demonstrate significant enhancement in terahertz radiation power from a photomixer that incorporates plasmonic contact electrodes. The plasmonic contact electrodes reduce the average transport path of photocarriers to the contact electrodes, increasing the ultrafast photocurrent that drives the terahertz antenna. We experimentally demonstrate an order of magnitude higher radiated power from a photomixer...
We present high-performance terahertz intensity modulators based on a new class of reconfigurable meta-surfaces that offer extreme diamagnetic switching capability over a broad frequency band. We experimentally demonstrate record high modulation depths (> 70%) and modulation bandwidths (> 1.5 THz) through a fully integrated platform at room temperature.
We present high-performance spatial light modulators based on a new class of reconfigurable meta-surfaces that offer extreme diamagnetic switching capability over a broad frequency band. We experimentally demonstrate record high modulation depths (> 70%) and modulation bandwidths (> 1.5 THz) through a fully integrated device solution at room temperature.
We present a novel photoconductive antenna which utilizes nanoscale plasmonic electrodes to significantly enhance the efficiency and terahertz radiation power of conventional photoconductive antennas. The terahertz radiation power enhancement results from a significant reduction in the average transport path of photocarriers to reach the device contact electrodes. Thus, the photocurrent levels feeding...
We present and experimentally demonstrate a terahertz intensity modulator, which offers more than 70% modulation depth over a 1.5 THz frequency band, under a modulation voltage of 30 V and modulation speeds exceeding 20 KHz. The achieved modulation depth is the highest reported among previously demonstrated terahertz intensity modulators, in general, and 5 times higher than the demonstrated broadband...
A broadband terahertz intensity modulator based on MEMS-reconfigurable mesh filters is presented and experimentally demonstrated. Modulator operation is based on reconfiguring the geometry of a multi-layer mesh filter from a capacitive configuration to an inductive configuration, which alters device scattering parameters from a low-pass filter to a high-pass filter, respectively. The geometry of the...
We experimentally demonstrate that utilizing plasmonic contact electrodes enhances the optical-to-terahertz conversion efficiency of photoconductive terahertz emitters and offers more than 50-times higher radiation powers compared to conventional photoconductive terahertz emission techniques without plasmonic electrodes.
Using plasmonic gratings, we have greatly increased the photo-absorbing active area of a photoconductive terahertz emitter, without sacrificing device ultrafast operation. More than 20 times radiation power enhancement was measured when compared to a similar emitter without plasmonic gratings.
We show that using plasmonic contact electrodes significantly enhances the quantum efficiency of ultrafast photoconductors and demonstrate 50-times higher optical-to-terahertz conversion efficiencies from a plasmonic photoconductive terahertz emitter in comparison with a conventional photoconductive emitter.
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