Pseudoheterodyne detection for background-free near-field spectroscopy
Pseudoheterodyne detection for background-free near-field spectroscopy
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DOI：
10.1063/1.2348781
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发表时间：
2006-09-04
影响因子：
4
通讯作者：
Hillenbrand, Rainer
中科院分区：
文献类型：
--
作者：
Ocelic, Nenad;Huber, Andreas;Hillenbrand, Rainer
作者提出了一种散射型近场光学显微镜的检测技术，能够在整个近紫外到远红外光谱范围内消除背景干扰。它同时测量近场光信号的振幅和相位的散射光干涉检测利用相位调制的参考波。他们将其背景抑制效率与其他已知方法进行了比较，并通过实验表明，即使在非干涉和零差干涉检测方法都失败的情况下，它也提供了可靠的近场光学材料对比度。(c)2006年，美国物理学会。
The authors present a detection technique for scattering-type near-field optical microscopy capable of background interference elimination in the entire near-UV to far-IR spectral range. It simultaneously measures near-field optical signal amplitude and phase by interferometric detection of scattered light utilizing a phase-modulated reference wave. They compare its background suppression efficiency to other known methods and experimentally show that it provides a reliable near-field optical material contrast even in the case where both noninterferometric and homodyne interferometric detection methods fail. (c) 2006 American Institute of Physics.