Pseudoheterodyne detection for background-free near-field spectroscopy
Autor: | Rainer Hillenbrand, Nenad Ocelic, Andreas J. Huber |
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Rok vydání: | 2006 |
Předmět: | |
Zdroj: | Applied Physics Letters. 89:101124 |
ISSN: | 1077-3118 0003-6951 |
Popis: | 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. |
Databáze: | OpenAIRE |
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