Closed-cycle cryostat for low-temperature hybrid nanophotonic systems

我们的目标是通过要求提供快速、稳定的温度控制和高分辨率光谱的光学访问的闭合循环低温恒温器系统来扩大我们在混合纳米光子结构和低维材料研究方面的能力和努力。该系统将集成在我们的光学光谱学实验室中，并与超快激光激发方案相结合，用于线性和非线性光学研究。这将代表着一种独特的实验方法，以扩大我们在低维材料，特别是2D半导体和钙钛矿研究方面的努力。通过抑制热激发，我们的目标是揭示纳米材料的内在光学性质，并在与光学纳米空间集成时最大化它们的光-物质相互作用。该设备还将有助于我们小组开始的一个新的研究领域--单光子发射器的研究，在这个领域，对样品温度的控制不仅是非常必要的，而且是必要的，以抑制降低量子光源效率和亮度的有害过程。优选的低温恒温器系统的特点是紧凑，允许安装在现有的光学工作台上，并且能够在广泛的温度范围(3-350K)上快速和稳定地控制样品环境，同时提供用于光学访问的窗口。利用这个低温恒温器系统，我们的目的是实现一种独特的实验装置，将精细的温度控制和具有高波长稳定性的超快激光光谱结合在一起，为研究低维纳米材料的光学性质及其光子应用开辟新的途径。

We aim to expand our capabilities and endeavors in the research of hybrid nanophotonic structures and low-dimensional materials by requesting a closed-cycle cryostat system offering fast, stable temperature control, and optical access for high-resolution spectroscopy. The system will be integrated in our optical spectroscopy laboratories and combined with ultrafast laser excitation schemes, for linear and non-linear optical investigation. This will represent a unique experimental approach to expand our efforts in the research of low-dimensional materials, in particular 2D semiconductors and perovskites. By suppressing thermal excitations, we aim to unveil the intrinsic optical properties of nanomaterials and to maximize their light-matter interaction when integrated with optical nanocavities. The equipment will also aid in a new field of research starting in our group, the study of single photon emitters, where the control of the sample temperature is not only highly desirable, but also necessary, in order to suppress detrimental processes reducing the efficiency and brightness of quantum light sources. The preferred cryostat system is characterized by its compactness, allowing the installation on existing optical tables, and by the rapid and stable control of the sample environment over a wide range of temperatures (3-350 K), while providing windows for optical access. With this cryostat system our intention is to realize a unique experimental setup, combining fine temperature control and ultrafast laser spectroscopy with high wavelength tenability, opening to realization of new approaches for investigating the optical properties of low-dimensional nanomaterials and their photonic applications.