Kevin A. Fischer

Coherent Generation of Nonclassical Light on Chip via Detuned Photon Blockade.

The on-chip generation of nonclassical states of light is a key requirement for future optical quantum hardware. In solid-state cavity quantum electrodynamics, such nonclassical light can be generated from self-assembled quantum dots strongly coupled to photonic crystal cavities. Their anharmonic strong light-matter interaction results in large optical nonlinearities at the single photon level, where the admission of a single photon into the cavity may enhance (photon tunneling) or diminish (photon blockade) the probability for a second photon to enter the cavity. Here, we demonstrate that detuning the cavity and quantum-dot resonances enables the generation of high-purity nonclassical light from strongly coupled systems. For specific detunings we show that not only the purity but also the efficiency of single-photon generation increases significantly, making high-quality single-photon generation by photon blockade possible with current state-of-the-art samples.

Nonclassical higher-order photon correlations with a quantum dot strongly coupled to a photonic-crystal nanocavity

We use the third- and fourth-order autocorrelation functions

Dissipative preparation of the exciton and biexciton in self-assembled quantum dots on picosecond time scales

g^{(3)}(\tau_1,\tau_2)

Dynamical modeling of pulsed two-photon interference

and

Deterministically charged quantum dots in photonic crystal nanoresonators for efficient spin–photon interfaces

g^{(4)}(\tau_1,\tau_2, \tau_3)

Self-homodyne measurement of a dynamic Mollow triplet in the solid state

to detect the non-classical character of the light transmitted through a photonic-crystal nanocavity containing a strongly-coupled quantum dot probed with a train of coherent light pulses. We contrast the value of

Photon blockade in two-emitter-cavity systems

g^{(3)}(0, 0)

Strongly cavity-enhanced spontaneous emission from silicon-vacancy centers in diamond

with the conventionally used

Complete coherent control of a quantum dot strongly coupled to a nanocavity

g^{(2)}(0)

Tuning the photon statistics of a strongly coupled nanophotonic system

and demonstrate that in addition to being necessary for detecting two-photon states emitted by a low-intensity source,