Acoustic spectral hole-burning in a two-level system ensemble

金刚石中表面声波的光控声子超辐射

Optically Switched Phonon Superradiance of Surface Acoustic Wave in Diamond

通过光学驱动氮空位中心能级跃迁增强自旋-声子耦合，在弱耦合区域触发表面声波声子超辐射相变，实现可调控的固态量子器件。

Microwave cavity-free hole burning spectroscopy of Er$^{3+}$:Y$_2$SiO$_5$ at millikelvin temperatures

Efficient quantum memory is of paramount importance for long-distance quantum communications, as well as for complex large-scale computing architectures. We investigate the capability of Er$^{3+}$:Y$_2$SiO$_5$ crystal to serve as a quantum memory for the travelling microwave photons by employing techniques developed for dense optical ensembles. In our efforts to do so, we have performed high-resolution microwave spectroscopy of Er$^{3+}$:Y$_2$SiO$_5$, where we identified electronic spin as well as hyperfine transitions. Furthermore, we have explored spectral hole burning technique and studied …

Control of single photon emitters in semiconductor nanowires by surface acoustic waves

We report on experimental study into the effects of surface acoustic waves on the optical emission of dot-in-a-nanowire heterostructures in III-V material systems. Under direct optical excitation, the excitonic energy levels in III-nitride dot-in-a-nanowire heterostructures oscillate at the acoustic frequency, producing a characteristic splitting of the emission lines in the time-integrated photoluminescence spectra. This acoustically induced periodic tuning of the excitonic transition energies is combined with spectral detection filtering and employed as a tool to regulate the temporal output…

Dispersive coupling between light and a rare-earth ion doped mechanical resonator

By spectrally hole burning an inhomogeneously broadened ensemble of ions while applying a controlled perturbation, one can obtain spectral holes that are functionalized for maximum sensitivity to different perturbations. We propose to use such hole burnt structures for the dispersive optical interaction with rare-earth ion dopants whose frequencies are sensitive to crystal strain due to the bending motion of a crystal cantilever. A quantitative analysis shows that good optical sensitivity to the bending motion is obtained if a magnetic field gradient is applied across the crystal during hole b…

稀土离子的声学诱导缀饰态观测

Observation of Acoustically Induced Dressed States of Rare-Earth Ions

研究利用高频表面声波产生的应变调制晶体铒离子二能级系统，实验观测到声学诱导缀饰态及强声子-离子耦合证据，为片上控制长寿命离子和构建高相干混合量子系统奠定基础。

一种用于利用高阶体声波谐振器探测自旋-声子相互作用的材料无关平台

A material-agnostic platform to probe spin-phonon interactions using high-overtone bulk acoustic wave resonators

本文提出了一种在毫开尔文温度和吉赫兹频率下探测自旋-声子耦合的平台，通过集成任意晶体的压电转移薄膜铌酸锂转换器，利用高阶体声波谐振器（HBARs）实现对自旋-声子相互作用的异质材料研究，展示了在钙钨酸盐和钇硅酸盐中实现高达0.5的协同效应。

毫开尔文温度下掺铒白钨矿晶体中长达一个月寿命的微波光谱烧孔

Month-long-lifetime microwave spectral holes in an erbium-doped scheelite crystal at millikelvin temperature

研究在10 mK毫开尔文温度下对CaWO4晶体中Er3+离子进行微波频段光谱烧孔，利用相邻183W核自旋作辅助能级，将烧孔与累积回波寿命提升至超一个月，有益于长寿命信号处理。

Long-lived guided phonons in fiber by manipulating two-level systems

The synthesis of ultra-long lived acoustic phonons in a variety of materials and device geometries could enable a range of new coherent information processing and sensing technologies; many forms of phonon dissipation pose a barrier to this goal. We explore linear and nonlinear contributions to phonon dissipation in silica at cryogenic temperatures using fiber-optic structures that tightly confine both photons and phonons to the fiber-optic core. When immersed in helium, this fiber system supports nearly perfect guidance of 9 GHz acoustic phonons; strong electrostrictively mediated photon-phon…