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By means of ab-initio time dependent density functional theory calculations carried out on an prototypical hybrid plasmonic device (two metallic nanoparticles bridged by a one-atom junction), we demonstrate the strong interplay between…

The single-photon transport in a single-mode waveguide, coupled to a cavity embedded with a two-leval atom is analyzed. The single-photon transmission and reflection amplitudes, as well as the cavity and the atom excitation amplitudes, are…

Quantum Physics · Physics 2009-11-13 Jung-Tsung Shen , Shanhui Fan

Single-photon sources are in high demand for quantum information applications. A paradigmatic way to achieve single-photon emission is through anharmonicity in the energy levels, such that the absorption of a single photon from a coherent…

Quantum Physics · Physics 2024-04-15 Anael Ben-Asher , Antonio I. Fernández-Domínguez , Johannes Feist

We study a system comprising of a double quantum well embedded in a micropillar optical cavity, where strong coupling between a direct exciton, indirect exciton, and cavity photon is achieved. We show that the resulting hybrid…

Mesoscale and Nanoscale Physics · Physics 2014-09-11 O. Kyriienko , I. A. Shelykh , T. C. H. Liew

A single quantum dot deterministically coupled to a photonic crystal environment constitutes an indispensable elementary unit to both generate and manipulate single-photons in next-generation quantum photonic circuits. To date, the scaling…

Photon emission by tunneling electrons can be encouraged by locating a resonator close to the tunnel junction and applying an appropriate voltage-bias. However, studies of normal metals show that the resonator also affects how the charges…

Mesoscale and Nanoscale Physics · Physics 2019-08-29 W. T. Morley , A. Di Marco , M. Mantovani , P. Stadler , W. Belzig , G. Rastelli , A. D. Armour

This work reports the spontaneous emergence of a photon current in a class of spin-cavity systems, where an assemble of quantum emitters interact with distinct photon modes confined in tunneling-coupled cavities. Specifically, with…

Quantum Physics · Physics 2025-02-03 Lei Qiao , Jiangbin Gong

We observe antibunching in the photons emitted from a strongly-coupled single quantum dot and pillar microcavity in resonance. When the quantum dot was spectrally detuned from the cavity mode, the cavity emission remained antibunched, and…

Tip-enhanced photoluminescence (TEPL) measurements are performed with sub-nanometer spatial resolution on individual molecules decoupled from a metallic substrate by a thin NaCl layer. TEPL spectra reveal progressive fluorescence quenching…

Mesoscale and Nanoscale Physics · Physics 2024-03-18 Katharina Kaiser , Michelangelo Romeo , Fabrice Scheurer , Guillaume Schull , Anna Rosławska

Electrically connected and plasmonically enhanced molecular junctions combine the optical functionalities of high field confinement and enhancement (cavity function), and of high radiative efficiency (antenna function) with the electrical…

An emitter in the vicinity of a metal nanostructure is quenched by its decay through non-radiative channels, leading to the belief in a zone of inactivity for emitters placed within $<$10nm of a plasmonic nanostructure. Here we demonstrate…

We study multiphoton blockade and photon-induced tunneling effects in the two-photon Jaynes-Cummings model, where a single-mode cavity field and a two-level atom are coupled via a two-photon interaction. We consider both the…

Quantum Physics · Physics 2020-11-12 Fen Zou , Xiao-Ya Zhang , Xun-Wei Xu , Jin-Feng Huang , Jie-Qiao Liao

An efficient silicon based light source presents an unreached goal in the field of photonics, due to Silicons indirect electronic band structure preventing direct carrier recombination and subsequent photon emission. Here we utilize…

Applied Physics · Physics 2017-11-06 Hasan Göktaş Fikri Serdar Gökhan , Volker J. Sorger

Quantum confinement in atomically-thin TMDCs enables the realization of deterministic single-photon emitters. The position and polarization control of single photons have been achieved via local strain engineering using nanostructures.…

The periodic flashing potential has proven to be a powerful tool for investigating directed atomic currents. By applying the flashing ring-shaped potential to spin-orbit (SO) coupled, noninteracting Bose-Einstein condensate (BEC) systems,…

Quantum Gases · Physics 2024-06-28 Zhiqiang Li , Xiaoxiao Hu , Zhao-Yun Zeng , Ai-Xi Chen , Xiaobing Luo

The junction of a scanning tunneling microscope (STM) operating in the tunneling regime was irradiated with femtosecond laser pulses. A photo-excited hot electron in the STM tip resonantly tunnels into an excited state of a single molecule…

Mesoscale and Nanoscale Physics · Physics 2015-05-19 Shiwei Wu , Wilson Ho

We observed a light-induced enhancement of the tunneling current propagating through an array of parallel carbon chains anchored between gold nanoparticles (NPs). In the presence of laser radiation characterized by a wavelength close to the…

Controlling electrically-stimulated quantum light sources (QLS) is key for developing integrated and low-scale quantum devices. The mechanisms leading to quantum emission are complex, as a large number of electronic states of the system…

Mesoscale and Nanoscale Physics · Physics 2024-02-28 Katharina Kaiser , Anna Rosławska , Michelangelo Romeo , Fabrice Scheurer , Tomáš Neuman , Guillaume Schull

We propose a single photon source based on a pair of weakly nonlinear optical cavities subject to a one-directional dissipative coupling. When both cavities are driven by mutually coherent fields, sub-poissonian light is generated in the…

Quantum Physics · Physics 2016-07-11 H. Flayac , V. Savona

Strong evidence of a single-photon tunneling effect, a direct analog of single-electron tunneling, has been obtained in the measurements of light tunneling through individual subwavelength pinholes in a thick gold film covered with a layer…

Strongly Correlated Electrons · Physics 2009-11-07 I. I. Smolyaninov , A. V. Zayats , A. Gungor , C. C. Davis