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Photonic quantum technology provides a viable route to quantum communication, quantum simulation, and quantum information processing. Recent progress has seen the realisation of boson sampling using 20 single-photons and quantum key…

A sequence of photoluminescence spectroscopy based methods are used to rigorously identify and study all the main spectral features (more than thirty emission lines) of site controlled InGaAs/AlGaAs quantum dots (QDs) grown along [111]B in…

We characterize the positively charged exciton (X1+) in single InGaAs quantum dots using resonant laser spectroscopy. Three samples with different dopant species (Be or C as acceptors, Si as a donor) are compared. The p-doped samples…

Mesoscale and Nanoscale Physics · Physics 2015-05-30 B. D. Gerardot , R. J. Barbour , D. Brunner , P. A. Dalgarno , A. Badolato , N. Stoltz , P. M. Petroff , J. Houel , R. J. Warburton

We analyze, through resonant photoluminescence, the spin dynamics of an individual magnetic atom (Mn) coupled to a hole in a semiconductor quantum dot. The hybrid Mn-hole spin and the positively charged exciton in a CdTe/ZnTe quantum dot…

Mesoscale and Nanoscale Physics · Physics 2017-06-21 A. Lafuente-Sampietro , H. Boukari , L. Besombes

This work presents epitaxial growth and optical spectroscopy of CdTe quantum dots (QDs) in (Cd,Zn,Mg)Te barriers placed on the top of (Cd,Zn,Mg)Te distributed Bragg reflector. The formed photonic mode in our half-cavity structure permits to…

Mesoscale and Nanoscale Physics · Physics 2017-03-24 W. Pacuski , J. -G. Rousset , V. Delmonte , T. Jakubczyk , K. Sobczak , J. Borysiuk , K. Sawicki , E. Janik , J. Kasprzak

We report on the spin properties of individual Mn atoms in II-VI semiconductor strain free quantum dots. Strain free Mn-doped CdTe quantum dots are formed by width fluctuations in thin quantum wells lattice matched on a CdTe substrate.…

Mesoscale and Nanoscale Physics · Physics 2015-06-18 L. Besombes , H. Boukari

We analyze the light scattered by a single InAs quantum dot interacting with a resonant continuous-wave laser. High resolution spectra reveal clear distinctions between coherent and incoherent scattering, with the laser intensity spanning…

Mesoscale and Nanoscale Physics · Physics 2015-06-05 K. Konthasinghe , J. Walker , M. Peiris , C. K. Shih , Y. Yu , M. F. Li , J. F. He , L. J. Wang , H. Q. Ni , Z. C. Niu , A. Muller

Polarization-resolved single dot spectroscopy performed on (211)B InAs/GaAs quantum dots reveals that the fine structure splitting of the excitonic levels in these dots is much lower compared to the usual (100)-grown InAs dots.…

We have investigated the spin preparation efficiency by optical pumping of individual Mn atoms embedded in CdTe/ZnTe quantum dots. Monitoring the time dependence of the intensity of the fluorescence during the resonant optical pumping…

Mesoscale and Nanoscale Physics · Physics 2012-06-18 C. Le Gall , R. S. Kolodka , C. Cao , H. Boukari , H. Mariette , J. Fernández-Rossier , L. Besombes

A high-efficiency spin-photon interface is an essential piece of quantum hardware necessary for various quantum technologies. Self-assembled InGaAs quantum dots have excellent optical properties, if embedded into an optical micro-cavity…

Mesoscale and Nanoscale Physics · Physics 2025-09-03 P. Steindl , T. van der Ent , H. van der Meer , J. A. Frey , J. Norman , J. E. Bowers , D. Bouwmeester , W. Löffler

Photonic integration is an enabling technology for photonic quantum science, offering greater scalability, stability, and functionality than traditional bulk optics. Here, we describe a scalable, heterogeneous III-V/silicon integration…

Genuine quantum-mechanical effects are readily observable in modern optomechanical systems comprising bosonic ("classical") optical resonators. Here we describe unique features and advantages of optical two-level systems, or qubits, for…

Scalable quantum photonic technologies require low-loss integration of many identical single-photon sources with photonic circuitry on a chip. Relatively complex quantum photonic circuits have already been demonstrated; however, sources…

Quantum Physics · Physics 2023-01-05 Łukasz Dusanowski , Dominik Köck , Christian Schneider , Sven Höfling

We demonstrate single photon emission from self-assembled m-plane InGaN quantum dots (QDs) embedded on the side-walls of GaN nanowires. A combination of electron microscopy, cathodoluminescence, time-resolved micro-PL and photon…

Mesoscale and Nanoscale Physics · Physics 2017-03-08 Tim J. Puchtler , Tong Wang , Christopher X. Ren , Fengzai Tang , Rachel A. Oliver , Robert A. Taylor , Tongtong Zhu

We employ two-dimensional (2D) coherent, nonlinear spectroscopy to investigate couplings within individual InAs quantum dots (QD) and QD molecules. Swapping pulse ordering in a two-beam sequence permits to distinguish between rephasing and…

We present a novel type of single photon source in solid state, based on the coherent laser light scattering by a single InAs quantum dot. We demonstrate that the coherence of the emitted single photons is tailored by the resonant…

Mesoscale and Nanoscale Physics · Physics 2011-11-08 Hai Son Nguyen , Gregory Sallen , Christophe Voisin , Philippe Roussignol , Carole Diederichs , Guillaume Cassabois

The nonlocal emitter-waveguide coupling, which gives birth to the so called giant atom, represents a new paradigm in the field of quantum optics and waveguide QED. In this paper, we investigate the single-photon scattering in a…

Quantum Physics · Physics 2021-12-08 Wei Zhao , Yan Zhang , Zhihai Wang

III-V semiconductor quantum dots (QDs) are near-ideal and versatile single-photon sources. Because of the capacity for monolithic integration with photonic structures as well as optoelectronic and optomechanical systems, they are proving…

We extend the concepts of the Autler-Townes doublet and triplet spectroscopy to quartuplet, quintuplet and suggest linkages in sodium atom in which to display these spectra. We explore the involved fundamental processes of quantum…

Quantum Physics · Physics 2015-06-15 Fazal Ghafoor

We present a detailed theoretical analysis of a multi-level quantum system coupled to two radiation fields and subject to decoherence. We concentrate on an effect known from quantum optics as the Autler-Townes splitting, which has been…

Mesoscale and Nanoscale Physics · Physics 2011-10-14 Jian Li , G. S. Paraoanu , Katarina Cicak , Fabio Altomare , Jae I. Park , Raymond W. Simmonds , Mika A. Sillanpaa , Pertti J. Hakonen