6 research outputs found
Independent electrical tuning of separated quantum dots in coupled photonic crystal cavities
Systems of photonic crystal cavities coupled to quantum dots are a promising
architecture for quantum networking and quantum simulators. The ability to
independently tune the frequencies of laterally separated quantum dots is a
crucial component of such a scheme. Here, we demonstrate independent tuning of
laterally separated quantum dots in photonic crystal cavities coupled by
in-plane waveguides by implanting lines of protons which serve to electrically
isolate different sections of a diode structure.Comment: 3 pages, 3 figure
H1 photonic crystal cavitites for hybrid quantum information protocols
Hybrid quantum information protocols are based on local qubits, such as
trapped atoms, NV centers, and quantum dots, coupled to photons. The coupling
is achieved through optical cavities. Here we demonstrate far-field optimized
H1 photonic crystal membrane cavities combined with an additional back
reflection mirror below the membrane that meet the optical requirements for
implementing hybrid quantum information protocols. Using numerical optimization
we find that 80% of the light can be radiated within an objective numerical
aperture of 0.8, and the coupling to a single-mode fiber can be as high as 92%.
We experimentally prove the unique external mode matching properties by
resonant reflection spectroscopy with a cavity mode visibility above 50%.Comment: 14 pages, 11 figure
Far-field emission profiles from L3 photonic crystal cavity modes
We experimentally characterize the spatial far-field emission profiles for
the two lowest confined modes of a photonic crystal cavity of the L3 type,
finding a good agreement with FDTD simulations. We then link the far-field
profiles to relevant features of the cavity mode near-fields, using a simple
Fabry-Perot resonator model. The effect of disorder on far-field cavity
profiles is clarified through comparison between experiments and simulations.
These results can be useful for emission engineering from active centers
embedded in the cavity.Comment: 9 pages, 7 figure