分光便利帳 |
特殊波長板を用いた偏光顕微ラマン測定 Polarization Measurements in Micro Raman Spectroscopy Using the Radial-Waveplate 齊藤 結花 特殊な波長板を用いて、顕微ラマン分光の実験配置下で試料面に平行(xy 偏光)のみならず垂直な偏光（ z 偏光）を効率よく誘起する偏光測定装置を作製した。波長板は８分割した波長板から構成されており、放射状と円周状偏光を生成する。この装置を用いて、従来強度が弱かった試料のz偏光成分を大きく増強した。 We demonstrate z-polarization sensitive detection in micro Raman spectroscopy by introducing a radially distributed polarized light and by employing a high numerical aperture objective lens and circular mask. The radial polarization is provided by a radial-waveplate consisting of an 8-way segmented half-waveplate with each segment having a different orientation of the optical axis. The z-polarization Raman components that are barely detectable in conventional measurements can be clearly observed in this experimental setup. |
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