We propose and demonstrate a hybrid cavity system in which metal nanoparticles are evanescently coupled to a
dielectric photonic crystal cavity using a nanoassembly method. While the metal constituents lead to strongly
localized fields, optical feedback is provided by the surrounding photonic crystal structure. The combined effect
of plasmonic field enhancement and high quality factor (<i>Q</i> ≈ 900) opens new routes for the control of light-matter
interaction at the nanoscale.
We introduce a novel approach to assemble fundamental nanophotonic model systems. The approach is based
on the controlled manipulation of single quantum emitters (defect centers in diamond) via scanning probes.
We demonstrate coupling of a single diamond nanocrystal to a planar photonic crystal double-heterostructure
cavity as well as to a silica toroidal resonator. Our studies represent an important step towards well-controlled
cavity-QED experiments with single defect centers in diamond.
We report on the fabrication and optical characterization of photonic crystal cavities for visible wavelengths
made from silicon nitride (SiN). We note significant improvements in fabrication process with respect to our
previous studies. The intrinsic luminescence of the SiN membranes was used as an internal light source to study
the quality factor of the cavity modes. We experimentally found values as high as 3400, which are up to the
present unsurpassed for photonic crystal resonators in the visible spectra range. Finite difference time domain
(FDTD) simulations suggest another boost by a factor of two is possible by further optimizing the fabrication
process. We describe a method by which arbitrary emitters or other nanoscopic objects can be coupled in a
deterministic way by using the manipulation capabilities of an atomic force microscope.
We demonstrate a hybrid approach for the realization of novel nanophotonic devices by combining lithographic
fabrication techniques with a nano-manipulation method. In particular, we report on the fabrication of photonic
crystal cavities as a platform to which arbitrary emitters or other nanoscopic objects can be coupled in a
deterministic way by exploiting the manipulation capabilities of an atomic force microscope. In addition, the
optical properties of such particle-cavity systems are analyzed with regard to changes of the quality factor and
resonance wavelength of the cavity mode. Our approach is well suited to create improved single photon sources
and also complex photonic devices with several emitters coupled coherently via shared cavity modes.