A low-temperature ultra-high vacuum scanning probe microscopy (SPM) system with molecular beam epitaxy capability and optical access was conceived, built, and tested in our lab. The design of the whole system is discussed here, with special emphasis on some critical parts. We made an SPM scanner head with a modified Pan-type design, enclosed by a double-layer cold room under a bath type cryostat. The scanner head is very rigid, compatible with optical access paths, and can accommodate both scanning tunneling microscope (STM) tips and atomic force sensors. Two piezo-actuated focus-lens stages are mounted on the two sides of the cold room to couple light in and out. To demonstrate the system performance, we performed STM and scanning tunneling spectroscopy studies. The herringbone reconstruction and atomic structure of Au(111) surface were clearly resolved. The dI/dV spectra of an Au(111) surface were obtained at 5 K. In addition, a periodic 2D tellurium (Te) structure was grown on Au(111) surface using MBE.
Scanning through space and time: past, present, and future of time-resolved scanning transmission soft X-ray microscopy
Swiss Light Source, Paul Scherrer Institut（瑞士光源，保罗谢勒研究所）；Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy（马克斯·博恩非线性光学和超短脉冲光谱研究所）；Helmholtz Zentrum Berlin für Materialien und Energie（柏林亥姆霍兹材料能源研究中心）
