Closed-cycle cryostat for low-temperature hybrid nanophotonic systems

我们的目标是扩大我们的能力和努力，在混合纳米光子结构和低维材料的研究，要求一个封闭的循环低温恒温器系统提供快速，稳定的温度控制，和光学访问高分辨率光谱。该系统将集成在我们的光谱实验室，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。这将代表一种独特的实验方法，以扩大我们在低维材料研究方面的努力，特别是2D半导体和钙钛矿。通过抑制热激发，我们的目标是揭示纳米材料的内在光学特性，并最大限度地提高其光-物质相互作用时，与光学纳米腔集成。该设备还将有助于我们小组开始的一个新的研究领域，即单光子发射器的研究，其中样品温度的控制不仅非常可取，而且也是必要的，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征在于其紧凑性，允许安装在现有的光学工作台上，以及在宽的温度范围（3-350 K）内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。有了这个低温恒温器系统，我们的目的是实现一个独特的实验装置，结合精细的温度控制和超快激光光谱与高波长可持续性，开放实现新的方法来研究低维纳米材料的光学特性及其光子应用。

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.