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Semiconductor quantum dots have recently emerged as a leading platform to efficiently generate highly indistinguishable photons [1-3], and this work addresses the timely question of how good these solid-state sources can ultimately be. Based on a microscopic theory, we establish the crucial impact that lattice relaxation has in these systems, which gives rise to a broad phonon sideband in bulk quantum...
Recent advances in cavity quantum optomechanics have enabled breakthroughs such as ground state cooling of mechanical motion, observation of quantum backaction, standard quantum limit of position measurement and entanglement between optical and mechanical degrees of freedom [1]. Simultaneously, the upgraded version of current gravitational-wave interferometers is expected to suffer from optomechanical...
Efficiently transducing microwave signals into optical signals is one of the major demands in modem telecommunication. Electro-optical crystals hosting optical whispering gallery modes incorporated in a properly designed microwave cavity emerge as a promising candidate towards much more efficient microwave-to-light transducer [1, 2]. Here, we propose to use a ferroelectric crystal close to its paraelectric-ferroelectric...
Neutral atoms trapped inside an optical cavity provide an ideal platform for the implementation of quantum networks [1]. In such a network, nodes containing multiple atomic qubits are essential for the construction of a quantum repeater as they allow for entanglement swapping and thus the generation of entanglement between qubits over long distances. Here we will show the realisation of such a multi-qubit...
Uniform passive fiber-ring cavities are macroscopic devices which are known to exhibit dissipative modulation instability (MI) when driven in the rather large dispersion regime [1]. In a previous study we showed that in this regime, a simple modulation of the dispersion along the length of the ring cavity is responsible for the appearance of a new domain of parametric instability, related to Faraday...
The latest advances in the design and implementation of semiconductor sources of quantum light show their competence to efficiently deliver indistingishable single photons [1-3] or photon pairs with high degree of entanglement [4-5]. These achievements combined with the possibility of photon storage [6] show the potential of quantum dots to become building blocks of a quantum network.
Achieving photon-photon interactions is one of the main objectives of the quantum information technology community, since these interactions provide the basis for deterministic quantum gates with high fidelity. In the last few years new milestones in creating phase-shifts [1] and quantum gates[2] have been achieved. Researching resource-moderate experimental realizations for the future development...
Quantum state engineering has seen important developments over the last decade. The use of hybrid protocols, combining the discrete and continuous variables of light, can achieve high detection efficiencies, making them a good candidate for the production of non-classical states. Schrödinger cat states (SCSs), superpositions of two coherent states |α〉 in phase opposition (ψcat) 〉 |α〉 ± |-α〉), constitute...
Stable and spectrally narrow laser sources referenced to ultrastable passive Fabry-Pérot cavities are invaluable for optical atomic clocks and they find important applications, e.g. in precision tests of relativity or novel radar applications. Ultimately the fractional frequency instability of the laser is limited by Brownian thermal noise of the cavity constituents.
Generating correlated photons is an essential technology for photonic quantum information experiments. Increasing the generation efficiency of photon pairs via the enhancement of material nonlinearity is important for various applications including a near-on-demand single photon source based on multiplexed photon pair sources [1]. In this regard, photonic crystal nanocavities are attractive nonlinear...
The photonic crystal (PhC) membrane represents a platform for planar integration of components, where cavities and waveguides may play a key role in realizing compact optical components with classical functionality such as switches, lasers, and amplifiers or quantum optical functionality such as integrated sources of quantum light. By leaving out a row of holes in an otherwise perfect PhC membrane...
Ultra-strong light-matter interactions can be realized in various physical systems and has thus attracted many experimental and theoretical investigations [1-4]. One possible realization is to couple strongly subwavelength split ring resonators (SRR) to the Landau level transition of a two dimensional electron (or hole) gas [2, 3]. In a previous work on parabolic AlGaAs/GaAs QWs, we showed that very...
Microresonator Kerr frequency combs have the potential to revolutionize many aspects of modem technology (e.g. in precision metrology, spectroscopy, as well as telecommunications). In Kerr cavities, stable, low-noise, optical frequency combs often take the form of temporal cavity solitons (CSs): ultra-short optical pulses that persist in driven nonlinear resonators [1]. Recently, studies of CSs under...
Nonlinear wavelength generations by using the optical waveguides are more compact, low cost, and efficient than using the traditional solid state systems [1], and the generated broadband light sources can be utilized in optical coherence tomography, frequency metrology, optical communications, and many other. In this work, the high quality of tantalum pentoxide (Ta2O5) micro-ring resonator has been...
Upconversion detection is a promising technology for measurement of IR signals in the 1.5 μm–2 μm region used for lidar remote sensing [1-2]. In comparison to conventional InGaAs detector, the upconversion detector can achieve IR detection with better signal-to-noise ratio (SNR), not only due to lower dark noise directly, but also because of its limited field-of-view and acceptance bandwidth that...
Pulse burst generation has important applications in material processing [1], seeding of free electron lasers [2] and coherent pulse stacking [3]. In particular, coherent pulse stacking technique allows further scaling of fiber and solid-state amplifiers by splitting the seed pulse into multiple replicas and stacking them into a single dominant pulse after the amplification. For this task, a pulse...
The I-SOC (Space Optical Clock on ISS) mission [1] is an ESA mission whose main goal is testing the Einstein Equivalence Principle and performing relativistic geodesy from space. It will be based on a strontium lattice clock on the ISS, which will be compared with ground clocks using advanced frequency link technologies, optical and microwave. The space clock will have 1×10−17 fractional inaccuracy,...
Probability distribution functions (PDF) with a tail longer than eight standard deviations are reflecting the presence of extreme processes in the system. Recently, we have shown that the cases of observation L-PDF need to be separated into two classes: the predictable events with L-PDF (PL-PDF) and the unpredictable (UL-PDF) ones. Also, it was observed that the case of oscillation system with seven...
Kerr frequency combs in passive resonators have attracted considerable interest during the last decade as a complementary approach to comb formation based on mode-locked lasers. Most of previous works have focused on monochromatic CW-pumping either with or without parametric seeding [1-3]. Here, we report on an extensive study of a dual pumping configuration in a passive nonlinear fiber ring cavity...
The soliton — soliton interactions in mode-locked fiber lasers catch the attention of optical scientific society because it abounds in multifarious effects. As a sequence of these interactions (direct or indirect) the solitons constitute multi-soliton complexes with distinctive features. Bound solitons, bunch of solitons, and soliton rains have been widely covered in the literature, where were described...
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