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Prof. Xiang Zhang's Laboratory at UC Berkeley |
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Nano-Phononic Resonators and Filters for RF Applications Inspired by the fact that the frequency of optical phonons in naturally existing crystals is in the order of 10^13 Hz, we are developing novel nano-structures mimicking natural crystals and use them as mechanical resonators or filters for radio frequency (RF 300MHz-100GHz) applications. We expect to create artificial optical phonons in the GHz range that can be coupled to ac electric field. The lattice vibration at specific frequency with high Q will be amplified by the structure itself and detected through innovative optical and electrical signal transduction methods. These novel nano-mechanical RF signal processors will alleviate the frequency limitation problem hampering the traditional cantilever beam approach. These phononic mechanical resonators and filters will have potential RF applications that replace many current devices through artificial effects such as surface acoustic wave and ferroelectricity generated out of artificially nanostructured, silicon compatible materials.
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