为了开展超高真空拉曼光谱学的研究,我们自主研制了超高真空拉曼光学显微镜.该显微镜作为一个独立单元,可安装到超高真空系统上,对其中的样品进行光学显微成像和微区拉曼散射光的提取和汇集.配合一台JY iHR550光谱仪所做的光谱测试表明,该显微镜对拉曼散射光的提取和汇集能力在光谱分辨、信噪比和低波数性能等方面均已达到国际商用仪器的水平.将此显微镜集成到一套超高真空系统上,初步研究了加热、通电对石墨烯拉曼光谱的影响和石墨烯的光电效应,得到了令人满意的实验结果.

A new type of instrument named “Ultrahigh Vacuum Raman Optical Microscope” has been successfully home-made for ultrahigh vacuum Raman spectroscopy.It can be built in an ultrahigh vacuum system as an individual unit.It can image the sample in the vacuum with high resolution and get the Raman scattering light simultaneously.It is confirmed,by spectroscopic experiments with a Horiba Jobin Yvon iHR550 Imaging Spectrometer,that the instrument is capable of acquiring Raman scattering light with such a high level as a current Horiba Jobin Yvon Raman spectrometer of LabRam800.The microscope has been successfully applied to an ultrahigh vacuum system for studying heat and electric current effect on the graphene Raman spectra and photoelectric effect.The preparatory results are satisfactory.