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Control of spontaneous emission, which is one of the fundamental concepts in the field of quantum optics, has been reported using photonic crystals and microcavities through the Purcell effect. Increasing the photonic density of states (PDOS) is the key to enhancing the spontaneous emission from emitters which have a low quantum yield. There have been several reports on the enhancement of spontaneous...
A combination of a single quantum emitter (a semiconductor quantum dot) with a semiconductor optical nanocavity has been employed to demonstrate devices ranging from optical switches and modulators controlled with sub-fJ energies, to quantum sources.
Spontaneous emission of light is essential to quantum optics in design and development of high efficiency optical devices which are useful in quantum optical telecommunication and to diverse applications such as Optical Time-Division-Multiplexing (OTDM), Wavelength-Division Multiplexing (WDM), Optical Switch, Super Lens, Laser, LED and Single Photon Source (SPS). The triangular lattice and square...
I discuss the the design of photonic crystal waveguides suitable for enhancing light-matter interaction, and give examples for the type of nonlinear enhancements already achieved, including adiabatic wavelength conversion and third harmonic generation.
We report a heralded single photon source model; it consists on active two-dimensional crystal over LiNbO3 excited by a laser source at (1310 nm and 1550 nm). Photons detected through the crystal are filtered to eliminate of the laser source one. The photons at 1310 nm and 1550 nm will be spatially separated; the photon at 1310 nm is the trigger to announce the photon at 1550 nm. The contribution...
Practical limitations are discussed for the exchange of photonic qubits in optical fibres carrying telecom traffic based on the noise generated by Raman spontaneous scattered photons from the classical signals. It is shown that these limitations are in the co- and counter-propagating directions with respect to the classical channels.
Using the dispersion management soliton concept and inelastic collision model between an electron and a multi-photon group, the extreme value characteristic of the dispersion period lengths in the total internal reflective photonic crystal fiber (TIRPCF) under multi-photon nonlinear Compton scattering. The result shows that there is a multi-extreme value system between the coupling pulse propagation...
We propose targeted coherent control of light confined near a quantum dot embedded in three-dimensional photonic crystals, which provides the basis of quantum information processing that can be used for nano-photonics devices.
According to quantum electrodynamics, the emission rate of a two-level quantum emitter is described by Fermi's golden rule. Currently, there are many efforts to control the emission rate of quantum emitters by optimizing the nanoscale environment via the local density of optical states (LDOS) by, e.g., reflecting interfaces, microcavities, photonic crystals, or plasmonic nanoantennae. Control of spontaneous...
Control over spontaneous emission of quantum dots is important for many applications, especially as light sources in photonic materials and nanostructures. Colloidal CdSe quantum dots have recently generated enormous interest because of the tunability of their emission energy with particle diameter over the entire visible range. The strength of the interaction of a quantum dot with the light field...
We have demonstrated that a two-dimensional photonic crystal fiber can be used as a novel nonlinear medium for atom optical experiments. Our results show for the first time that cold atoms can be guided optically through this fiber with high efficiency and especially with a high density. In order to study this system a new experiment for creating cold optically guided atoms has been built up. Our...
We propose to use localized slow Bloch modes in photonic crystals to achieve vertical operation in quantum photonic devices. With our specific implementation, we expect a Purcell factor of 45.
Strong optical confinement implemented with 2D photonic-crystal (PhC) microcavities provides a powerful tool for controlling the features of light-matter interaction. Combined with nanostructures such as quantum wells, quantum wires (QWRs) or quantum dots, the PhC cavities - efficiently controlling spontaneous emission [1] - are envisaged to bring superior semiconductor-laser performance [2], which...
We design extremely flexible, ultrahigh-Q, diamond-based double-heterostructure photonic crystal slab cavities by modifying the refractive index of the diamond. The refractive index changes needed for ultrahigh-Q cavities with Q ~ 107, are well within what can be achieved (Deltan ~ 0.02). The Q is around 30 times larger than previously reported designs in diamond. At the same time, the cavity volumes...
Single photons are at the heart of optical quantum technologies such as quantum cryptography, quantum computing and quantum metrology. In this paper we report on the creation of photon pairs via four-wave-mixing (FWM) in birefringent photonic crystal fibres (PCF). It has recently been suggested that for thoroughly engineering the phase matching condition of a birefringent PCF, photon pairs can by...
Microcavities in diamond-based photonic crystals are being considered as an attractive architecture to manipulate and control atom-photon coupling. Here we consider a photonic crystal structure consisting of a triangular lattice of air holes etched into a thin free-standing membrane of diamond. By introducing point defects into the periodic structure, light can be localized in three dimensions within...
A comprehensive theory of couplings between a cavity and different charge configurations in a quantum dot is developed. It is shown that the quantum anti-Zeno effect is essential for the results obtained by QED experiments. The quantum dynamics of the system employing the quantum master equation is analysed. A Stansky-Krastanov InAs QD grown on a GaAs substrate was assumed, and the only first confined...
A new cavity-optomechanical system has been developed comprised of two doubly-clamped silicon nitride cantilevers with a 1D photonic crystal etched into them. We will discuss the optical properties of the system and potential applications to solid-state cavity QED with diamond color centers.
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