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The observation of quantum dot resonance fluorescence enabled a new solid-state approach to generating single photons with a bandwidth almost as narrow as the natural linewidth of a quantum dot transition. Here, we operate in the Heitler…

Quantum Physics · Physics 2012-07-20 Clemens Matthiesen , Anthony Nickolas Vamivakas , Mete Atature

High-purity multi-photon states are essential for photonic quantum computing. Among existing platforms, semiconductor quantum dots offer a promising route to scalable and deterministic multi-photon state generation. However, to fully…

Single photons in Laguerre-Gaussian (LG) beams, which carry orbital angular momentum (OAM), could enable more robust and efficient photonic quantum communication and information processing, as well as enhanced sensitivity in quantum…

Large-scale quantum information processors or quantum communication networks will require reliable exchange of information between spatially separated nodes. The links connecting these nodes can be established using traveling photons that…

Quantum Physics · Physics 2014-11-06 M. Pechal , L. Huthmacher , C. Eichler , S. Zeytinoglu , A. A. Abdumalikov , S. Berger , A. Wallraff , S. Filipp

Single self-assembled InAs/GaAs quantum dots are promising bright sources of indistinguishable photons for quantum information science. However, their distribution in emission wavelength, due to inhomogeneous broadening inherent to their…

We report on the triggered generation of indistinguishable photons by solid-state single-photon sources in two separate cryogenic laser scanning microscopes. Organic fluorescent molecules were used as emitters and investigated by means of…

Quantum Physics · Physics 2009-11-13 V. Ahtee , R. Lettow , R. Pfab , A. Renn , E. Ikonen , S. Götzinger , V. Sandoghdar

We report on the efficient generation of single photons, making use of spontaneous Raman scattering in a single trapped ion. The photons are collected through in-vacuum high-NA objectives. Photon frequency, polarization and temporal shape…

Quantum Physics · Physics 2013-05-13 Christoph Kurz , Jan Huwer , Michael Schug , Philipp Müller , Jürgen Eschner

Studying plasma dynamics is crucial for understanding processes like inertial confinement fusion, material damage, and shockwave formation from intense laser or current interactions. While pump-probe methods are standard for capturing these…

In this work, we present a stand-alone and fiber-coupled quantum-light source. The plug-and-play device is based on an optically driven quantum dot delivering single photons via an optical fiber. The quantum dot is deterministically…

We demonstrate a compact, spectrally-selective, and tunable delay line for single photons emitted by quantum dots. This is achieved by fine-tuning the wavelength of the optical transitions of such "artificial atoms" into a spectral window…

Mesoscale and Nanoscale Physics · Physics 2015-12-30 Johannes S. Wildmann , Rinaldo Trotta , Javier Martín-Sánchez , Eugenio Zallo , Oliver G. Schmidt , Armando Rastelli

An intuitive physical mechanism for single attosecond pulse generation in multi-cycle pulse regime is proposed. We suggest that the continuum spectra of HHG can be controlled through the modulation of carrier wave, while keeping the…

Optics · Physics 2011-11-01 Xiang Yang , Yueping Niu , Shangqing Gong

We demonstrate a high-purity source of indistinguishable single photons using a quantum dot embedded in a nanophotonic waveguide. The source features a near-unity internal coupling efficiency and the collected photons are efficiently…

Optical tools are of great promise for generation of spin waves due to the possibility to manipulate on ultrashort time scales and to provide local excitation. However, a single laser pulse can inject spin waves only with a broad frequency…

Mesoscale and Nanoscale Physics · Physics 2017-04-26 M. Jäckl , V. I. Belotelov , I. A. Akimov , I. V. Savochkin , D. R. Yakovlev , A. K. Zvezdin , M. Bayer

We demonstrate a spectrally broadband and effcient technique for collecting photoluminescence from a single InAs quantum dot directly into a standard single mode optical fiber. In this approach, an optical fiber taper waveguide is placed in…

Optics · Physics 2015-05-27 M. Davanco , M. T. Rakher , W. Wegscheider , D. Schuh , A. Badolato , K. Srinivasan

We discovered a simple regime where a near-critical plasma irradiated by a laser of experimentally available intensity can self-organize to produce positrons and accelerate them to ultra-relativistic energies. The laser pulse piles up…

Plasma Physics · Physics 2023-07-26 K. Sugimoto , Y. He , N. Iwata , I-L. Yeh , K. Tangtartharakul , A. Arefiev , Y. Sentoku

Semiconductor quantum dots (QDs) enable the generation of single and entangled photons, useful for various applications in photonic quantum technologies. Specifically for quantum communication via fiber-optical networks, operation in the…

Large-scale quantum networks require the implementation of long-lived quantum memories as stationary nodes interacting with qubits of light. Epitaxially grown quantum dots hold great potential for the on-demand generation of single and…

A semiconductor quantum dot (QD) can generate highly indistinguishable single-photons at a high rate. For application in quantum communication and integration in hybrid systems, control of the QD optical properties is essential.…

Photon bunching in incoherent cathodoluminescence (CL) spectroscopy originates from the fact that a single high-energy electron can generate multiple photons when interacting with a material, thus revealing key properties of electron-matter…

Scaling up a superconducting quantum computer will likely require quantum communication between remote chips, which can be implemented using an itinerant microwave photon in a transmission line. To realize high-fidelity communication, it is…