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Abstract: |
Wavelength-scale
optical resonators can enable on-chip manipulation of photons,
and will be important building blocks for optical- and
quantum-communication systems. We recently demonstrated photonic
crystal nanobeam cavity1,2 , fabricated in silicon,
that supports modes with quality factor Q~106.
Furthermore, by taking advantage of mechanical degrees of
freedom of two coupled-nanobeam cavities3,
we demonstrated
reconfigurable optical filters4 that could be
dynamically and reversibly tuned. In our structure, that
combines NEMS with nanophotonics, an external bias voltage
controls the separation (<100nm) between the nanobeams via the
electrostatic force, which in turn has a strong effect on the
resonant wavelength of the structure. We demonstrate tunable
filters with a tuning range of ~10nm, using less than 6V of
external bias and negligible steady-state power consumption4.
Bright
single-photon source based on diamond nanowire5, that
we recently discovered, is another example of novel
functionalities enabled by nanostructuring.
Nitrogen vacancy (NV) color center in
diamond has emerged as promising quantum emitter that
combines the key advantages of isolated atomic systems with
solid-state integration. In order to further improve the
efficiency of NV-based quantum-emitters, it is important to
enhance the collection efficiency of emitted photons. We
achieved this using nanowire-antenna approach, and demonstrated
an order of magnitude larger collection efficiency over devices
based on bulk diamond crystals.
1P.
B. Deotare, M. W. McCutcheon, I. W. Frank, M. Khan, and M.
Lončar, APL, 94, 121106 (2009)
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