A Vanadium Dioxide Metamaterial Disengaged from Insulator-to-Metal Transition.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 26352780.
- Also identified by DOI 10.1021/acs.nanolett.5b02361.
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Abstract
We report that vanadium dioxide films patterned with λ/100000 nanogaps exhibit an anomalous transition behavior at millimeter wavelengths. Most of the hybrid structure's switching actions occur well below the insulator to metal transition temperature, starting from 25 °C, so that the hysteresis curves completely separate themselves from their bare film counterparts. It is found that thermally excited intrinsic carriers are responsible for this behavior by introducing enough loss in the context of the radically modified electromagnetic environment in the vicinity of the nanogaps. This phenomenon newly extends the versatility of insulator to metal transition devices to encompass their semiconductor properties.