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Trapped ions are a key experimental platform for quantum computing, while photons transport information over long distances. Optical cavities provide a coherent link between these two systems, as demonstrated by recent experiments with calcium ions.
The application of a specific metal organice vapour phase epitaxy (MOVPE) growth process for (GaIn)As-based VECSEL using thermally more efficiently decomposing MO-group-V-sources results in an extended wavelength range and facilitates the necessary strain compensation of the highly compressive-strained (GaIn)As-quantum well layers by tensile-strained Ga(PAs) barrier layers. Applying a closed-loop-design...
We present an experimental demonstration of an optical switch operating in the quantum regime, consisting of a single trapped atom near a nanoscale photonic crystal cavity.
This tutorial provides an introduction to the current state-of-the-art, the challenges and the prospects of achieving quantum optical control over nano-, micro- and macro-mechanical devices, i.e. quantum optomechanics.
A novel high pulse-energy Yb-doped all-fiber dual-cavity laser with large core-diameter fiber-based passive Q-switcher is reported. The monolithic fiber oscillator generates pulses with peak power of 3.4 kW and single pulse energy of 484 µJ.
Open-access microcavities are an original approach for lab-on-a-chip optofluidic sensing since they offer a direct access to the confined electromagnetic field. This work describes their basic characteristics for refractive index and nanoparticle sensing.
Monolayer graphene sheet has been integrated on top of small disk optical resonator in SOI platform. Electro-optic interaction between graphene and whispering gallery mode of the cavity has been demonstrated and studied for modulation application.
We report optical trapping of 60 nm Au nanoparticles using photonic crystal slot-cavities with Q's of ∼7200 and 0.3mW of guided power at 1.6µm. Histograms of the cavity transmission are used to quantitatively analyze the trapping dynamics by modeling the back-action of the nanoparticles in the trap.
We propose novel 1.55-µm capsule-shaped metallic-cavity lasers with curved facets to reduce plasmonic losses. Significant reduction of threshold current from 291 µA to 60 µA is demonstrated with effective modal volume of 0.45 µm3.
New results on integration of colloidal quantum dots (QDs) into SiN microstructures are reported, including QD positioning with nanometric accuracy and the efficient coupling of their emission to waveguides and cavities. The results are relevant to on-chip quantum optics and information processing.
We combine the fast guided-mode expansion with a genetic algorithm to perform a global optimization of several widely used photonic crystal cavity designs. The procedure consistently improves their quality factor by more than one order of magnitude, and is in addition highly customizable.
We designed scalable all-optical logic gates that operate at the same input and output wavelength based on microrings. We investigated the influence of input power fluctuations and fabrication errors.
We propose a novel and ultrasensitive scheme of rotation sensing by measuring farfield intensity from an asymmetric microcavity laser. We optimize the cavity shape and show the farfield sensitivity is enhanced by introducing structural chirality.
Recent advances in quantum dot based quantum technology are presented: scalable fabrication of bright sources of single photons or entangled photon pairs, optical non-linearities at the few photon scales and first implementations of quantum gates.
We present the design and realization of strong light-matter coupling in monolithic metamaterial nanocavities. We achieve a Rabi frequency of 2.5 THz (corresponding to a polariton splitting of 20%) in a mode volume of 1.34×10−3(λ/n)3.
We demonstrate cavity-enhanced HHG with a tailored transverse mode simultaneously allowing for efficient conversion to the XUV and for unparalleled output coupling efficiencies. Due to its purely geometric nature, this method is power scalable.
In the strong coupled cavity optomechanics, we find the island structure in the temporal evolution map of mean phonon number. Analytical results are provided to obtain the optimal cooling limits with the frequency matching condition.
We demonstrate Purcell enhancement of single NV centers in L3 photonic crystal cavities made from high-purity single-crystal diamond. Furthermore, NV centers were created using an implantation mask in the cavity high field region.
Colorless, self-seeded km-long fiber cavity RSOA lasers embedded in an access network are investigated for the optimum operation conditions. Theoretical predictions on the proper configuration and the impact of dispersion are supported by experiments.
We present on-chip Si3N4 optomechanical transducers that integrate nanomechanical tuning forks with microdisk resonators for displacement measurements. Enhanced mechanical Q relative to single cantilevers and mechanical frequency adjustment by beam stress engineering were realized.
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