In this division, by combining confocal microscopy with infrared scanning near-field microscope, the optical diffraction limit has been exceeded, obtaining a high spatial resolution. In the time dimension, through 2–14 μm femtosecond or picosecond lasers and a 500–5000 nm femtosecond laser, along with a pump-probe technique and coherent multi-dimensional spectroscopy, the time resolution of low-dimensional materials and their optoelectronic devices has been obtained. In the energy dimension, the photon energy in a large range has been examined using a grating spectrometer and a Mercury Cadmium Telluride (MCT) detector based on Fourier-transform infrared (FTIR) spectroscopy. With such an infrastructure, research in spectral microscopy, ultrafast spectroscopy, and temp-spatial resolution can be conducted.