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Single photon detectors based on superconductor nanowires (SNSPDs) provide high efficiency and good timing performance, as well as broad optical detection bandwidth. To move towards applications in high bandwidth quantum communication and processing, ultrafast detectors with high efficiency are needed. We realize compact SNSPDs with sub-micrometer effective length by aligning the nanowire perpendicular...
Photonic crystal slot cavities are designed with Q up to 2×106. Strong field confinement allows for significant gradient optical force actuation. Measured devices show high extinction ratio and mechanical resonance at low optical driving power.
We demonstrate nanophotonic circuits for integration of high Q micromechanical resonators and nanooptical components. Mechanical resonance of nanostring is actuated and readout by optomechanical interaction. Quality factor up to 696,000 is obtained.
We demonstrate enhanced gradient optical force between a high-Q micro-disk resonator and a waveguide. We find that the total optical force is composed of contributions from the cavity backaction, the reactive and evanescent coupling.
We analyze the effect of spatial mode beating on optical forces in coupled waveguide resonators. Continuous sign and amplitude change is achieved through optical phase tuning. Competing force components are decomposed via optical mode expansion.
Tribological components made from CVD diamond are commonly used for protection against abrasion in rough environments. Such components can be used e.g. in textile industry as thread guiding devices provided that surface roughness and resultant friction are low. In this work we report on the fabrication of CVD diamond components of non-planar shape. These devices were fabricated in a negative replication...
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