Themed collection Nanoscale quantum technologies

33 items
Editorial

Introduction to nanoscale quantum technologies

Qing Dai, Chao-Yang Lu and Zhipei Sun introduce the Nanoscale themed collection on Nanoscale quantum technologies.

Graphical abstract: Introduction to nanoscale quantum technologies
From the themed collection: Nanoscale quantum technologies
Review Article

Silicon photonics interfaced with microelectronics for integrated photonic quantum technologies: a new era in advanced quantum computers and quantum communications?

Silicon photonics is rapidly evolving as an advanced chip framework for implementing quantum technologies.

Graphical abstract: Silicon photonics interfaced with microelectronics for integrated photonic quantum technologies: a new era in advanced quantum computers and quantum communications?
Review Article

From cavity optomechanics to cavity-less exciton optomechanics: a review

Cavity optomechanics investigates the interaction between electromagnetic waves and mechanical motion enhanced by the resonant cavity. In cavity-less exciton optomechanics, the resonant cavity is replaced by excitonic resonance.

Graphical abstract: From cavity optomechanics to cavity-less exciton optomechanics: a review
From the themed collection: Nanoscale quantum technologies
Open Access Communication

Photon pairs bi-directionally emitted from a resonant metasurface

SPDC in a metasurface with the signal and idler photons emitted in opposite directions.

Graphical abstract: Photon pairs bi-directionally emitted from a resonant metasurface
Communication

Terahertz cavity optomechanics using a topological nanophononic superlattice

A terahertz multi-optical mode cavity optomechanical device is designed using a topological superlattice and Ωmjj-1≠ωj+1j. Scattering photons could doubly resonate with cavity modes at an anti-Stokes (Stokes) frequency and pump frequency.

Graphical abstract: Terahertz cavity optomechanics using a topological nanophononic superlattice
From the themed collection: Nanoscale quantum technologies
Open Access Paper

Nitrogen vacancy defects in single-particle nanodiamonds sense paramagnetic transition metal spin noise from nanoparticles on a transmission electron microscopy grid

Non-integrated correlative light-electron microscopy with nitrogen vacancy sensing on transmission electron microscopy finder grids for the study of paramagnetic Prussian blue analogue nanoparticles.

Graphical abstract: Nitrogen vacancy defects in single-particle nanodiamonds sense paramagnetic transition metal spin noise from nanoparticles on a transmission electron microscopy grid
From the themed collection: Nanoscale quantum technologies
Paper

Vertically oriented self-assembly of colloidal CdSe/CdZnS quantum wells controlled via hydrophilicity/lipophilicity balance: optical gain of quantum well stacks for amplified spontaneous emission and random lasing

Novel, vertically oriented self-assembly of core/shell CdSe/CdZnS colloidal quantum wells stacked in film via the control of hydrophilicity/lipophilicity is shown for optical gain media, allowing amplified spontaneous emission and random lasing.

Graphical abstract: Vertically oriented self-assembly of colloidal CdSe/CdZnS quantum wells controlled via hydrophilicity/lipophilicity balance: optical gain of quantum well stacks for amplified spontaneous emission and random lasing
Paper

Novel two-dimensional magnets with an in-plane auxetic effect

Magnetic ordering of 2D auxetic magnets is more stable than that of non-auxetic ones under mono-axial strain.

Graphical abstract: Novel two-dimensional magnets with an in-plane auxetic effect
From the themed collection: Nanoscale quantum technologies
Paper

Spin transfer torques due to the bulk states of topological insulators

We determine the spin transfer torque due to TI bulk states, showing that it has a distinguishable signature and can be sizeable in real samples.

Graphical abstract: Spin transfer torques due to the bulk states of topological insulators
From the themed collection: Nanoscale quantum technologies
Paper

Spontaneous valley polarization and valley-nonequilibrium quantum anomalous Hall effect in Janus monolayer ScBrI

By obtaining the real magnetic anisotropy energy (MAE) under different strains, when 1.5% < ε < 1.8%, due to spontaneous valley polarization, intrinsic out-of-plane (OOP) magnetic anisotropy, and a chiral edge state, the VQAHE can reliably appear between two HVM states.

Graphical abstract: Spontaneous valley polarization and valley-nonequilibrium quantum anomalous Hall effect in Janus monolayer ScBrI
From the themed collection: Nanoscale quantum technologies
Open Access Paper

Quantum plasmonic two-dimensional WS2–MoS2 heterojunction

Quantum plasmonics enhance photoluminescence in two-dimensional heterostructures.

Graphical abstract: Quantum plasmonic two-dimensional WS2–MoS2 heterojunction
From the themed collection: Nanoscale quantum technologies
Paper

Strain-induced ordered Ge(Si) hut wires on patterned Si (001) substrates

In this study, we demonstrate uniform Ge hut wire arrays on a flattened surface by multi-layer growth of strained Ge(Si) layers separated with Si spacer layers on top of site-controlled GeSi hut wires.

Graphical abstract: Strain-induced ordered Ge(Si) hut wires on patterned Si (001) substrates
From the themed collection: Nanoscale quantum technologies
Paper

Coherent imaging and dynamics of excitons in MoSe2 monolayers epitaxially grown on hexagonal boron nitride

By performing ultrafast nonlinear spectroscopy, we assess the optical coherence of MoSe2 monolayers grown by molecular beam epitaxy.

Graphical abstract: Coherent imaging and dynamics of excitons in MoSe2 monolayers epitaxially grown on hexagonal boron nitride
From the themed collection: Nanoscale quantum technologies
Paper

Performance of the nanopost single-photon source: beyond the single-mode model

The nanopost single-photon source exhibits surprisingly high collection efficiency, despite its geometrical simplicity, due to beneficial scattering into radiation modes.

Graphical abstract: Performance of the nanopost single-photon source: beyond the single-mode model
From the themed collection: Nanoscale quantum technologies
Open Access Paper

Two-qubit atomic gates: spatio-temporal control of Rydberg interaction

With pulse sequences of structured light, we achieve robust ultrafast high-fidelity C-PHASE gates in non-independent atomic qubits. The optimal protocols form lattices in parameter space rotated by an angle that depends on the proximity of the qubits.

Graphical abstract: Two-qubit atomic gates: spatio-temporal control of Rydberg interaction
From the themed collection: Nanoscale quantum technologies
Paper

Enhancement of spontaneous emission from CdSe/ZnS quantum dots through silicon nitride photonic crystal cavity based on miniaturized bound states in the continuum

A practical construction method for on-chip surface-emitting light sources on silicon-based integrated photonic devices, demonstrated with a SiN photonic crystal cavity on CdSe/ZnS quantum dots.

Graphical abstract: Enhancement of spontaneous emission from CdSe/ZnS quantum dots through silicon nitride photonic crystal cavity based on miniaturized bound states in the continuum
From the themed collection: Nanoscale quantum technologies
Paper

Non-centrosymmetric Weyl semimetal state and strain effect in the twisted-brick phase transition metal monochalcogenides

The nodal loop phase transition to Weyl fermion in twisted-brick-MoTe is realized via spin–orbit interactions. Strain effects can tune the topological strength strikingly; hence, a strain-tuned partly-ideal Weyl semimetal phase in MoTe was observed.

Graphical abstract: Non-centrosymmetric Weyl semimetal state and strain effect in the twisted-brick phase transition metal monochalcogenides
From the themed collection: Nanoscale quantum technologies
Paper

Insulator-to-metal phase transition in a few-layered MoSe2 field effect transistor

We report an insulator-to-metal phase transition in a few-layer MoSe2 field-effect transistor. The conductivity (shown in figure) becomes metallic at a critical carrier density of 1.2 x 1012 cm-2 and is analyzed using percolation theory.

Graphical abstract: Insulator-to-metal phase transition in a few-layered MoSe2 field effect transistor
From the themed collection: Nanoscale quantum technologies
Open Access Paper

Ferroelectric valley valves with graphene/MoTe2 van der Waals heterostructures

The control of the ferroelectric domains in this valley valve allows generating and tuning topological excitations, thus providing a promissing platform to print circuits displaying a ballistic behavior.

Graphical abstract: Ferroelectric valley valves with graphene/MoTe2 van der Waals heterostructures
From the themed collection: Nanoscale quantum technologies
Open Access Paper

Purifying single photon emission from giant shell CdSe/CdS quantum dots at room temperature

Single photon purity of an individual quantum dot is severely compromised by biexciton emission. Giant shell quantum dots are allowing for biexciton spectral separation with a long-pass filter improving single photon purity at room temperature.

Graphical abstract: Purifying single photon emission from giant shell CdSe/CdS quantum dots at room temperature
From the themed collection: Nanoscale quantum technologies
Paper

Interplay of Purcell effect and extraction efficiency in CsPbBr3 quantum dots coupled to Mie resonators

Perovskites quantum dots coupled to Mie resonators display an 18-fold luminescence enhancement. Spatially- and time-resolved measurements, coupled to numerical simulations, confirm increased absorption, Purcell factor and extraction efficiency.

Graphical abstract: Interplay of Purcell effect and extraction efficiency in CsPbBr3 quantum dots coupled to Mie resonators
From the themed collection: Celebrating our 2024 Prizewinners
Paper

The dependence of timing jitter of superconducting nanowire single-photon detectors on the multi-layer sample design and slew rate

The authors present the dependence of the timing jitter of superconducting nanowire single-photon detectors on the multi-layer sample design and slew rate.

Graphical abstract: The dependence of timing jitter of superconducting nanowire single-photon detectors on the multi-layer sample design and slew rate
From the themed collection: Nanoscale quantum technologies
Open Access Paper

AC-driven multicolor electroluminescence from a hybrid WSe2 monolayer/AlGaInP quantum well light-emitting device

A multicolor AC-driven light-emitting device by integrating a WSe2 monolayer and AlGaInP–GaInP multiple quantum well (MQW) structures.

Graphical abstract: AC-driven multicolor electroluminescence from a hybrid WSe2 monolayer/AlGaInP quantum well light-emitting device
From the themed collection: Nanoscale quantum technologies
Open Access Paper

Uniaxial strain tuning of organic molecule single photon sources

We investigate repeatable and reliable tuning of single organic molecule fluorescence by applying strain via a piezoelectric substrate.

Graphical abstract: Uniaxial strain tuning of organic molecule single photon sources
From the themed collection: Nanoscale quantum technologies
Paper

Deciphering the photophysical properties of near-infrared quantum emitters in AlGaN films by transition dynamics

We investigate the key photophysical properties of NIR quantum emitters from point defects in AlGaN films both theoretically and experimentally.

Graphical abstract: Deciphering the photophysical properties of near-infrared quantum emitters in AlGaN films by transition dynamics
From the themed collection: Nanoscale quantum technologies
Open Access Paper

Impact of indirect transitions on valley polarization in WS2 and WSe2

Valley polarization is a new resource for optoelectronics and information technologies. This article demonstrates the critical role of indirect transitions in protecting valley polarization in few-layer WS2 and WSe2.

Graphical abstract: Impact of indirect transitions on valley polarization in WS2 and WSe2
From the themed collection: Nanoscale quantum technologies
Paper

Hybrid electroluminescent devices composed of (In,Ga)N micro-LEDs and monolayers of transition metal dichalcogenides

With recent advances in GaN LED technology, we explore a new class of compact, stand-alone transition metal dichalcogenide electroluminescence devices.

Graphical abstract: Hybrid electroluminescent devices composed of (In,Ga)N micro-LEDs and monolayers of transition metal dichalcogenides
From the themed collection: Nanoscale quantum technologies
Paper

Highly-efficient radiative thermal rectifiers based on near-field gap variations

A schematic diagram of the proposed design scheme for highly-efficient radiative thermal rectifiers based on thermally-induced near-field gap variations.

Graphical abstract: Highly-efficient radiative thermal rectifiers based on near-field gap variations
From the themed collection: Nanoscale quantum technologies
Open Access Paper

Nano-optical imaging of exciton–plasmon polaritons in WSe2/Au heterostructures

We maped in real space the propagative exciton–plasmon polaritons in WSe2/Au heterostructures. These polaritons are formed due to the strong coupling between excitons in WSe2 and surface plasmon polaritons on Au.

Graphical abstract: Nano-optical imaging of exciton–plasmon polaritons in WSe2/Au heterostructures
From the themed collection: Nanoscale quantum technologies
Open Access Paper

Synthesis of mono- and few-layered n-type WSe2 from solid state inorganic precursors

Tuning the charge transport properties of two-dimensional transition metal dichalcogenides (TMDs) is pivotal to their future device integration in post-silicon technologies.

Graphical abstract: Synthesis of mono- and few-layered n-type WSe2 from solid state inorganic precursors
From the themed collection: Nanoscale quantum technologies
Paper

Coupling spin defects in hexagonal boron nitride to titanium dioxide ring resonators

Spin defects in hexagonal boron nitride are coupled to microring cavity resonator.

Graphical abstract: Coupling spin defects in hexagonal boron nitride to titanium dioxide ring resonators
From the themed collection: Nanoscale quantum technologies
Paper

Single charge control of localized excitons in heterostructures with ferroelectric thin films and two-dimensional transition metal dichalcogenides

Single charge control of localized excitons has been demonstrated in heterostructures with ferroelectric thin films and two-dimensional transition metal dichalcogenides, which are confirmed with magneto-photoluminescence spectroscopy.

Graphical abstract: Single charge control of localized excitons in heterostructures with ferroelectric thin films and two-dimensional transition metal dichalcogenides
From the themed collection: Nanoscale quantum technologies
Open Access Paper

Machine learning enhanced in situ electron beam lithography of photonic nanostructures

Machine learning is used to improve in situ electron beam lithography capabilities. Specially trained algorithms increase the sensitivity by more than a factor of 10 in the deterministic processing of high-performance quantum light sources.

Graphical abstract: Machine learning enhanced in situ electron beam lithography of photonic nanostructures
From the themed collection: Nanoscale quantum technologies
33 items

About this collection

Guest Edited by Professor Qing Dai (National Center for Nanoscience and Technology, China), Professor Chao-Yang Lu (University of Science and Technology of China, China) and Professor Zhipei Sun (Aalto University, Finland).

Materials and structures at the nanoscale play a key role in various current and emerging quantum technologies, such as quantum computing, quantum sensing and imaging, and quantum communication. In the last few decades, we have witnessed significant progress in nanoscience and nanotechnology, which has enabled great successes from fundamental research to applications in quantum technologies, facilitating completely new horizons in this area. This collection of research and review articles aims to provide a snapshot of recent progress in quantum technologies, including quantum materials, computing, sensing, imaging, photonics, optics and more, which we hope will inspire future developments.

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