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THz technology offers multiple applications in areas such as remote sensing, spectroscopy, biomedical imaging, and ultra-wide bandwidth communications [1]. However, obtaining high-frequency performance at THz frequencies has proven challenging in conventional electronic devices. This difficulty motivated the exploration of unconventional transport mechanisms such as electron plasma waves. Two dimensional...
We provide an initial perturbation to the channel, by applying a small E-field pulse of amplitude Ex=10−3 V/cm at the center. Power emitted due to positive feedback is then recorded at the measurement planes, depicted in Fig. 1b. Shown in Fig. 6a is the simulated emitted spectrum for two devices. Sharp self-sustained oscillations are observed at the plasmonic resonance frequencies. As expected, these...
In this work we provide a new outlook on plasmonic effects in periodically patterned semiconductor ribbons. Based on the classical electromagnetic theory we develop an analytical model to represent these effects and show that: 1. THz plasmons can be excited at room temperature in periodically patterned semiconductor 2DEGs (regardless of the semiconductor material); 2. its strength and frequency dependence...
In this paper, we examine graphene as a material for reconfigurable terahertz (THz) optoelectronics. The ability of electrically tuning its optical properties in a wide range of THz frequencies, together with its 2-D nature and facile integration, leads to unique opportunities for inventing novel THz devices as well as for extending the performance of existing THz technologies. We first review progress...
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