Bragg scattering of light in vacuum structured by strong periodic fields

Suppression of surface-related loss in a gated semiconductor microcavity

We present a surface passivation method that reduces surface-related losses by almost two orders of magnitude in a highly miniaturized GaAs open microcavity. The microcavity consists of a curved dielectric distributed Bragg reflector (DBR) with radius $\sim 10$ $μ$m paired with a GaAs-based heterostructure. The heterostructure consists of a semiconductor DBR followed by an n-i-p diode with a layer of quantum dots in the intrinsic region. Free-carrier absorption in the highly doped n- and p-layers is minimized by positioning them close to a node of the vacuum electromagnetic-field. The surface,…

量子耗散体的光学力学：一般方法和结构化压缩真空效应

Quantum optomechanics of lossy bodies: general approach and structured squeezed vacuum effects

本文研究了在自由空间中外部量子照明下宏观耗散体所经历的总体光学力学力，通过改进的朗之万噪声公式推导了非平衡情况下麦克斯韦应力张量的时间平均期望值，展示了通过驱动散射场使用各向异性多模压缩真空态可产生非经典力。

Fluorescence into flat and structured radiation continua: An atomic density matrix without a master equation

We investigate an atomic $Λ$-system with one transition coupled to a laser field and a flat continuum of vacuum modes and the other transition coupled to field modes near the edge of a photonic band gap. The system requires simultaneous treatment of Markovian and non-Markovian dissipation processes, but the photonic band gap continuum can not be eliminated within a density matrix treatment. Instead we propose a formalism based on Monte-Carlo wavefunctions, and we present results relevant to an experimental characterization of a structured continuum.

Control of nonlinear optical phenomena and spatially structured optical effects in a four-level quantum system near a plasmonic nanostructure

We investigate the nonlinear optical response of a four-level double-V-type quantum system interacting with a pair of weak probe fields while located near a two-dimensional array of metal-coated dielectric nanospheres. Such a quantum system contains a V-type subsystem interacting with surface plasmons, and another V-type subsystem interacting with the free-space vacuum. A distinctive feature of the proposed setup is its sensitivity to the relative phase of the applied fields when placed near the plasmonic nanostructure. We demonstrate that due to the presence of the plasmonic nanostructure, th…

Collective atomic recoil motion in short-pulse multi-matter-optical wave mixing

An analytical perturbation theory of short-pulse, matter-wave superradiant scatterings is presented. We show that Bragg resonant enhancement is incapacitated and both positive and negative order scatterings contribute equally. We further show that propagation gain is small and scattering events primarily occur at the end of the condensate where the generated field has maximum strength, thereby explaining the apparent ``asymmetry" in the scattered components with respect to the condensate center. In addition, the generated field travels near the speed of light in a vacuum, resulting in signific…

弱驱动二能级介质中储层控制的电磁感应光栅

Reservoir-controlled electromagnetically induced gratings in a weakly driven two-level medium

研究弱驱动二能级介质中电磁感应光栅的传输与衍射，通过工程化量子储层（热库、压缩真空库）调控探针光响应，实现衍射效率与方向性的主动控制。

Effect of boundaries on vacuum field fluctuations and radiation-mediated interactions between atoms

In this paper we discuss and review several aspects of the effect of boundary conditions and structured environments on dispersion and resonance interactions involving atoms or molecules, as well as on vacuum field fluctuations. We first consider the case of a perfect mirror, which is free to move around an equilibrium position and whose mechanical degrees of freedom are treated quantum mechanically. We investigate how the quantum fluctuations of the mirror's position affect vacuum field fluctuations for both a one-dimensional scalar and electromagnetic field, showing that the effect is partic…

受激参量下转换：从基础相干性到结构光应用

Stimulated Parametric Down-Conversion: From Foundational Coherence to Structured Light Applications

本综述揭示受激参量下转换中闲频光与泵浦场和种子复共轭的点积关系，统一解释图像转移、相位共轭、轨道角动量守恒及矢量涡旋光束处理，并探讨其作为工具及量子区域应用。

量子涨落空间模式分析仪

Quantum fluctuations spatial mode profiler

针对低光子数光场空间模式难以表征的问题，提出基于同态测量和结构化掩模的量子涨落空间模式重建方法，并成功应用于含热噪声的压缩真空场分析。

真空中有损耗磁电样品的量子电动力学：修正的兰格vin噪声形式化

Quantum electrodynamics of lossy magnetodielectric samples in vacuum: modified Langevin noise formalism

本文通过建立电磁场的规范量子化，推导出修正的兰格vin噪声形式化，证明其能描述任何线性、非均匀和磁电样品的场景。

分子聚集体中由等离激元介导的相干布居振荡

Plasmon mediated coherent population oscillations in molecular aggregates

本文利用超快二维电子光谱研究J-聚集体激子与金纳米狭缝阵列等离激元场的集体强耦合，在室温下观测到等离激元驱动的介观距离相干激子布居转移，为通过真空场调控物质激发相干输运提供新途径。

量子优势在经典场特性传感中的应用

Quantum Advantage for Sensing Properties of Classical Fields

本文提出量子信号学习框架，通过双模压缩和被动光学实现经典场属性的高效传感，展示了量子加速在电磁相关性测量等任务中的优势。