期刊
ANNUAL REVIEW OF CHEMICAL AND BIOMOLECULAR ENGINEERING, VOL 9
卷 9, 期 -, 页码 365-387出版社
ANNUAL REVIEWS
DOI: 10.1146/annurev-chembioeng-060817-084150
关键词
scanning near-field optical microscopy; nanoscale imaging; diffraction limit; optical spectroscopy; tip-enhanced Raman scattering; TERS; SNOM
Light-matter interactions can provide a wealth of detailed information about the structural, electronic, optical, and chemical properties of materials through various excitation and scattering processes that occur over different length, energy, and timescales. Unfortunately, the wavelike nature of light limits the achievable spatial resolution for interrogation and imaging of materials to roughly lambda/2 because of diffraction. Scanning near-field optical microscopy (SNOM) breaks this diffraction limit by coupling light to nanostructures that are specifically designed to manipulate, enhance, and/or extract optical signals from very small regions of space. Progress in the SNOM field over the past 30 years has led to the development of many methods to optically characterize materials at lateral spatial resolutions well below 100 nm. Wereview these exciting developments and demonstrate how SNOMis truly extending optical imaging and spectroscopy to the nanoscale.
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