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Monolayer materials present a new opportunity in integrated photonics, due to their unprecedented ability to be integrated on any substrate, and exceptional optoelectronic properties. Here, we present our recent results on laser and nonlinear optical devices based on monolayer materials integrated on nanophotonic devices.
Progress in cavity quantum electrodynamics (cQED) trends to decreasing mode volume and increasing light-matter interaction. We demonstrate a metal-semiconductor nanopillar cQED system that exhibits bright single-photon generation, strong Purcell enhancement, and viability as a new platform for cQED.
We demonstrate a nanophotonic platform based on 2D materials coupled to photonic crystal cavities. We show strong enhancement (∼60 times) of light emission due to the photonic crystal.
We show that the use of a coupled cavity or a bimodal cavity can improve single photon generation significantly relative to a single quantum dot strongly coupled to a cavity.
Through experimental study of an array of coupled photonic crystal cavities, we find that the intercavity coupling is significantly larger than the fabrication-induced disorder, a necessary condition for the generation of strongly correlated photons.
We measure the third-order autocorrelation function of a photon stream from a single quantum dot coupled to a photonic-crystal nanocavity. This is the first measurement of the higher-order photon correlation function on a solid state quantum emitter.
We observe deterministic charging of quantum dots embedded in a p-n-i-n junction coupled to photonic crystal nanoresonators by spectroscopic means and demonstrate Zeeman splitting under applied magnetic field in the Voigt configuration.
Ultrafast nonlinear interaction between two weak light beams mediated by a strongly coupled quantum dot-photonic crystal cavity system is demonstrated.
We demonstrate an electrically driven single mode photonic crystal cavity LED with record speed of operation (10 GHz) and 0.25 fJ/bit energy consumption, the lowest of any optical transmitter to date.
We demonstrate off-resonant coupling between a single quantum dot and a nanobeam photonic crystal cavity, under resonant excitation of the dot or the cavity. We confirm that this is an incoherent phonon-mediated process.
The combination of a single quantum emitter (a quantum dot) and an optical nanocavity has been employed to demonstrate devices ranging from quantum sources and gates to optical switches and modulators controlled with sub-fJ energies.
We demonstrate a 300 MHz quantum dot single photon source at 900 nm triggered by a telecommunications wavelength laser. The quantum dot is excited by on-chip-generated second harmonic radiation, resonantly enhanced by a photonic nanocavity.
Coherent interaction between a quantum dot and a resonant laser is observed through an incoherent read-out channel created by coupling to an off-resonant cavity. Under bichromatic driving of the quantum dot optical output collected from the off-resonant cavity exhibits two peaks, a signature of Rabi-side bands that matches closely with our theoretical model. The off-resonant cavity provides a convenient...
We demonstrate electro-optic modulation in a GaAs laterally doped photonic crystal cavity diode with ultra-low switching energy of several fJ/bit. A short non-radiative carrier lifetime allows fast switching with an upper threshold of 100 GHz.
We demonstrate the actuation of a double beam optomechanical cavity with a sinusoidally varying optical input power. We observe the driven mechanical motion with only 200 nW coupled to the optical cavity mode.
Off-resonant quantum dot-cavity coupling is studied both experimentally and theoretically. A theoretical model is proposed to explain the observations.
The experiments show that the coupled QD-cavity system is a promising candidate for probing CQED as well as for optical information processing. Our present work includes building of a three level system in a QD coupled to cavity, which is essential for construction of any quantum information processing devices.
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