APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011;
Dallas, Texas
Abstract: V3.00004 : Coupling single electron spins in diamond to integrated optical structures
9:48 AM–10:24 AM
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Diamond is an attractive material for some electronic and photonic
applications because of its excellent chemical stability and high thermal
conductivity and carrier mobility. Diamond appears to be an excellent
material for quantum information processing and magnetic sensing
applications as well, with many optically active paramagnetic centers. Of
these, the most carefully studied to date has been the nitrogen-vacancy (NV)
color center, since it is optically addressable and can exhibit electron
spin coherence lifetimes exceeding 1 ms at room temperature. This long-lived
coherence is usually attributed to the nuclear spin-zero environment of the
diamond lattice, which can be further improved with isotopic purification.
These capabilities have recently allowed for some remarkable demonstrations
in this system such as controlled coupling between single electronic and
nuclear spins.
For quantum information technologies, NV centers that are mutually optically
coupled could enable long-distance quantum communication through repeaters.
However, given the low branching ratio of natural emission from NV centers
in bulk diamond into the zero phonon line, coupling these centers to
cavities with at least moderately large Purcell factors is a critically
important step. In this talk I will describe our recent progress in
realizing microcavities with low loss and small mode volume in two hybrid
systems: silica microdisks coupled to diamond nanoparticles, and gallium
phosphide microdisks coupled to single-crystal diamond. In both cases, we
have demonstrated coupling between NV centers and whispering-gallery-type
cavity modes. Finally, I will present our most recent progress toward
fabricating waveguides and microcavities directly in diamond.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.V3.4