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We have investigated pressurized VO2 using optical pump — THz probe spectroscopy. Distinct pump-probe signals and an excitation threshold are observed even in the metallic state. Our results are consistent with a pressure-driven Mott-Hubbard transition.
The abrupt changes in structural, electronic and optical properties that accompany the vanadium dioxide (VO2) phase transition make it a promising material for a wide range of thin-film applications in electronics,photonics and plasmonics. Several physical vapor-deposition techniques are used by various research groups, but until now there has been no systematic comparison of the three most common...
The insulator-to-metal transition (IMT) of vanadium dioxide (VO2) is promising for applications in optoelectronic switching devices. The IMT is reversible, involves dramatic changes in the optical and electrical properties, and can be triggered both optically and electrically. Furthermore, the IMT is extremely fast when excited by ultra-short optical pulses. Using this method, one transition cycle...
We demonstrate electro-optical modulation in a silicon-vanadium dioxide hybrid device. A combined effect from applied electric field and Joule heating is used to switch a microscopic vanadium dioxide patch deposited on top of a silicon single-mode ridge waveguide.
We demonstrate optical switching in ultra-compact hybrid Si-VO2 ring resonators. Large changes in resonant wavelength and optical transmission are achieved by photothermally triggering the reversible semiconductor-to-metal phase-transition of VO2.
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