SETUP AND APPLICATION OF SCANNING NEAR-FIELD OPTICAL MICROSCOPY |
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Authors: | Xu Shi-f Zhu Xing Zhou He-tian Shen Yu-min Fei Teng Zhang Yu Yin Yan Zhang Bei Dai Lun Liu Xiao-ling Hu Jian-cheng Lu Ping and Zhai Zhong-he |
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Institution: | College of Life Sciences Peking University, Beijing 100871, China; State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China |
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Abstract: | The research on the setup and application of scanning near-field optical microscopy (SNOM) performed in our laboratory is reviewed in this report. We have constructed a versatile low temperature scanning near-field optical microscope with the capability of near-field imaging and spectroscopy, operating at liquid nitrogen temperature. A special designed coaxial double lens was used to introduce the illumination beam through a 200μm fiber; the detected optical signal was transmitted via a fiber tip to an avalanche photon detector. The performance test shows the stability of the new design. The shear force image and optical image of a standard sample are shown. A system of SNOM working at room temperature and atmosphere was used to characterize semiconductors and bio-molecular samples. It revealed the unique features of semiconductor microdisks in the near-field that is significantly different from that of far-field. The effects of different geographic microstructures on the near-field light distribution of InGaP, GaN, and InGaN multi-quantum-well microdisk were observed. |
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Keywords: | near-field optics scanning near-field optical microscope microdisk HeLa cells |
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