Quantum Photonic Microscope

量子光子显微镜是一个独立的单元，它允许研究光-物质耦合量子材料和腔量子电动力学系统的量子光学现象，包括单量子点和原子薄晶体。它由一个低振动、无氦的低温恒温器组成，达到4K的低温基础温度来容纳样品。低温恒温器将允许在亚微米分辨率的自由空间进行光激发和检测。样品的光激发是由一个频率可调的，模式锁定的脱手激光系统。由于我们的目标是研究光谱范围在680-1000 nm之间的谐振波长系统，因此该激光系统由泵浦激光器和钛蓝宝石振荡器组成。该系统由一个标准光谱仪和一组高灵敏度、低时间抖动的单光子探测器组成。在亚100ps尺度下研究样品中量子相干性的特征过程，需要在整个感兴趣的光谱窗口中具有小于50ps的时间抖动的单光子探测器。

The Quantum Photonic Microscope is an autonomous unit, which allows the investigation of quantum optical phenomena of light-matter coupled quantum materials and cavity quantum electrodynamic systems, including single quantum dots and atomically thin crystals. It consists of a low vibration, helium-free cryostat, reaching a base cryogenic-temperature of 4K to host the sample. The cryostat will allow for optical excitation and detection in free space with sub-micrometer resolution. Optical excitation of the samples is facilitated by a frequency tunable, mode-locked hands-off laser system. Since we target the investigation of systems with resonant wavelengths in the spectral range between 680–1000 nm, this laser system is composed of a pump laser, and a Titanium-Sapphire Oscillator. The system is complemented by a measurement unit, which is composed of a standard spectrograph, which is equipped with a high sensitivity Si CCD detector, and a set of high sensitivity, low time-jitter single-photon detectors. The characteristic processes of quantum coherence in the samples which will be investigated on the sub 100 ps scale, calling for single photon detectors with a time-jitter, which is smaller than 50 ps throughout the spectral window of interest.