Midinfrared Index Sensing of pL-Scale Analytes Based on Surface Phonon Polaritons in Silicon Carbide

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• 作者：Burton Neuner ; III ; Dmitriy Korobkin ; Chris Fietz ; Davy Carole ; Gabriel Ferro ; Gennady Shvets
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：April 29, 2010
• 年：2010
• 卷：114
• 期：16
• 页码：7489-7491
• 全文大小：216K
• 年卷期：v.114,no.16(April 29, 2010)
• ISSN：1932-7455

文摘

We present the first demonstration of pL-scale analyte index sensing based on surface phonon polaritons in the midinfrared, which are excited at the silicon carbide/analyte interface in the Otto configuration. Attenuated total reflectance measurements reveal analyte index specificity through a double-scan of wavelength and incidence angle for analyte volumes as small as 100 pL. Midinfrared sensing tuned to surface phonon polariton resonance paves the way for index sensing of analytes beyond current volume−resolution limits.