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A resonance tracking method for stable operation of a near-field scanning optical microscope in liquid environment
Institution:1. Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University, Suwon 440-746, Republic of Korea;2. Department of Information and Communication Engineering, Inha University, Incheon 402-751, Republic of Korea;3. Center for Subwavelength Optics, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Republic of Korea;4. School of mechanical Engineering, Kyungpook National University, 1370 Sangyuk-dong, Buk-gu, Daegu 702-701, Republic of Korea;5. Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Republic of Korea;6. Department of Physics, Incheon National University, Incheon 406-772, Republic of Korea
Abstract:We report on the novel design of the near-field scanning optical microscope (NSOM) which operates in liquid environment. A resonance tracking digital scanning method is applied to compensate the resonance shift due to the evaporation of the liquid in the atmospheric pressure. By this method, stable operation of NSOM system is demonstrated by showing topographic images of the metallic grating embedded in liquid environment.
Keywords:Near-field scanning optical microscope  Topography  Plasmonics  Nano photonics  Surface plasmon
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