Near-infrared single-photons from aligned molecules in ultrathin crystalline films at room temperature

Mechanical Resonators for Quantum Optomechanics Experiments at Room Temperature

All quantum optomechanics experiments to date operate at cryogenic temperatures, imposing severe technical challenges and fundamental constraints. Here we present a novel design of on-chip mechanical resonators which exhibit fundamental modes with frequencies $f$ and mechanical quality factors $Q_\mathrm{m}$ sufficient to enter the optomechanical quantum regime at room temperature. We overcome previous limitations by designing ultrathin, high-stress silicon nitride (Si$_3$N$_4$) membranes, with tensile stress in the resonators' clamps close to the ultimate yield strength of the material. By pa…

核自旋扩散在晶态纳米硅颗粒动态核极化中的作用

The role of nuclear spin diffusion in dynamic nuclear polarization of crystalline nanoscale silicon particles

本研究通过第一性原理计算和有限元模拟，发现晶态纳米硅颗粒的超极化增强和弛豫时间与尺寸无关，并揭示了超极化输运机制，为其他材料的自旋扩散研究提供了可调模拟方法。

基于应变结晶InGaP的高Q值蹦床谐振器用于集成自由空间光力学

High-Q trampoline resonators from strained crystalline InGaP for integrated free-space optomechanics

本研究展示了基于拉伸应变结晶InGaP的弦和蹦床谐振器，通过应变工程在室温下实现超过10^7的机械品质因子和高达7·10^11 Hz的Q·f乘积，为室温集成自由空间量子光力学铺平道路。

Plasmonics enabled atomically thin linearly polarized emitter at room temperature

Two-dimensional transition metal di-chalcogenide semiconductors provide unique possibilities to investigate strongly confined excitonic physics and a plasmonic platform integrable to such materials constitutes a hybrid system that can be of interest to enable manipulation of their cumulative optical properties. Here we report tuning of excitonic emission from monolayer WSe2, mechanically exfoliated on top of a periodic two dimensional plasmonic array of elliptical gold (Au) nanodiscs. By exploiting the polarization-dependent nature of plasmonic resonance of the nano plasmonic array (NPA), the …

Novel Fabrication of Micromechanical Oscillators with Nanoscale Sensitivity at Room Temperature

We report on the design, fabrication, and implementation of ultrasensitive micromechanical oscillators. Our ultrathin single-crystal silicon cantilevers with integrated magnetic structures are the first of their kind: They are fabricated using a novel high-yield process in which magnetic film patterning and deposition are combined with cantilever fabrication. These novel devices have been developed for use as cantilever magnetometers and as force sensors in nuclear magnetic resonance force microscopy (MRFM). These two applications have achieved nanometer-scale resolution using the cantilevers …