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We demonstrate that non-chiral nanoparticles can produce chiral light when point emitters are coupled to their surface plasmon modes (SPMs) under certain conditions. Chiral emission arises from asymmetrical plasmon mode propagation from the…

Quantum Physics · Physics 2025-10-22 Yining Xuan , Daito Miyazaki , Yuki Ishikawa , Mark Sadgrove

Quantum random number generation is a key ingredient for quantum cryptography and fundamental quantum optics and could advance Monte-Carlo simulations and machine learning. An established generation scheme is based on single photons…

Electromagnetic signals in circuits consist of discrete photons, though conventional voltage sources can only generate classical fields with a coherent superposition of many different photon numbers. While these classical signals can…

The quantum spin Hall effect (QSHE) has formed the seed for contemporary research on topological quantum states of matter. Since its discovery in HgTe/CdTe quantum wells and AlGaAs/GaAs heterostructures, all such systems have so far been…

Strongly Correlated Electrons · Physics 2018-11-07 Gang Li , Werner Hanke , Ewelina M. Hankiewicz , Felix Reis , Joerg Schaefer , Ralph Claessen , Congjun Wu , Ronny Thomale

Chiral quantum systems have received intensive attention in fundamental physics and applications in quantum information processing including optical isolation and photon unidirectional emission. Here, we design an on-chip emitter-resonator…

Quantum Physics · Physics 2019-04-26 Lei Tang , Jiangshan Tang , Weidong Zhang , Guowei Lu , Han Zhang , Yong Zhang , Keyu Xia , Min Xiao

Atomically flat semiconducting materials such as monolayer WSe$_2$ hold great promise for novel optoelectronic devices. Recently, quantum light emission has been observed from bound excitons in exfoliated WSe$_2$. As part of developing…

Mesoscale and Nanoscale Physics · Physics 2018-07-10 L. C. Flatten , L. Weng , A. Branny , S. Johnson , P. R. Dolan , A. A. P. Trichet , B. D. Gerardot , J. M. Smith

In nanostructures, the light-matter interaction can be engineered to be chiral. In the fully quantum regime, a chiral one-dimensional atom, a photon propagating in one direction interacts with the atom; a photon propagating in the other…

In the search for materials for quantum information science applications, colloidal semiconductor nanoplatelets (NPLs) have emerged as a highly promising new class of materials due to their interesting optical properties, such as narrow…

Interlayer excitons (IXs) formed at the interface of atomically-thin semiconductors possess various novel properties. In a parallel development, nanoscale strain engineering has emerged as an effective means for creating 2D quantum light…

The on-chip generation of non-classical states of light is a key-requirement for future optical quantum hardware. In solid-state cavity quantum electrodynamics, such non-classical light can be generated from self-assembled quantum dots…

Single-photon sources play a key role in photonic quantum technologies. Semiconductor quantum dots can emit indistinguishable single photons under resonant excitation. However, the resonance fluorescence technique typically requires…

Chiral quantum optics has become a burgeoning field due to its potential applications in quantum networks or quantum simulation of many-body physics. Current implementations are based on the interplay between local polarization and…

Quantum Physics · Physics 2020-04-08 Eduardo Sánchez-Burillo , Chao Wan , David Zueco , Alejandro González-Tudela

Photonic integrated circuits (PICs) enable miniaturization of optical quantum circuits because several optic and electronic functionalities can be added on the same chip. Single photon emitters (SPEs) are central building blocks for such…

Quantum correlated, highly non-degenerate photons can be used to synthesize disparate quantum nodes and link quantum processing over incompatible wavelengths, thereby constructing heterogeneous quantum systems for otherwise unattainable…

Optics · Physics 2017-09-14 Yong Meng Sua , Heng Fan , Amin Shahverdi , Jia-Yang Chen , Yu-Ping Huang

Efficient generation of radiation in the mid- and far- infrared relies primarily on lasers and coherent nonlinear optical phenomena driven by lasers. This wavelength range lacks of luminescent devices because the spontaneous emission rate…

We demonstrate a method to generate photons by injecting hot electrons into a {\it pn} junction within a \ce{GaAs/AlGaAs} heterostructure. Hot electrons are generated by biasing across a mesoscopic potential in {\it n}-type region and…

Mesoscale and Nanoscale Physics · Physics 2024-06-10 S. Norimoto , R. Saxena , P. See , A. Nasir , J. P. Griffiths , C. Chen , D. A. Ritchie , M. Kataoka

An outstanding challenge in quantum photonics is scalability, which requires positioning of single quantum emitters in a deterministic fashion. Site positioning progress has been made in established platforms including defects in diamond…

Mesoscale and Nanoscale Physics · Physics 2017-06-28 Artur Branny , Santosh Kumar , Raphaël Proux , Brian D. Gerardot

The appearance of single photon sources in atomically thin semiconductors holds great promises for the development of a flexible and ultra-compact quantum technology, in which elastic strain engineering can be used to tailor their emission…

We propose a concept of quantum dot based light emitting diode that produces circularly polarized light due to the tuning of the exciton fine structure by magnetic field and electron nuclear hyperfine interaction. The device operates under…

Mesoscale and Nanoscale Physics · Physics 2023-06-23 A. V. Shumilin , T. S. Shamirzaev , D. S. Smirnov

Rate of single-photon generation by quantum emitters (QEs) can be enhanced by placing a QE inside a resonant structure. This structure can represent an all-dielectric micro-resonator or waveguide and thus be characterized by ultra-low loss…

Mesoscale and Nanoscale Physics · Physics 2017-01-25 Sergey I. Bozhevolnyi , Jacob B. Khurgin