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Pseudoheterodyne detection for background-free near-field spectroscopy
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10.1063/1.2348781
/content/aip/journal/apl/89/10/10.1063/1.2348781
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/10/10.1063/1.2348781
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Interferometric detection of near-field and background scatterings from a -SNOM probe employing a phase-modulated reference beam . (a) Experimental setup. (b) Detected signal spectrum (schematic).

Image of FIG. 2.
FIG. 2.

(Color online) Midinfrared near-field images of a SiC polytype change using different detection techniques. (a) Topography. (b) Noninterferometric detection yielding corresponding to Eq. (2). (c) Amplitude and phase images obtained by the homodyne technique. (d) Amplitude and phase images obtained by the phase-modulation technique. A, B, and C mark the sections of different reference phase . Note that due to drift the images are shifted slightly against each other.

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/content/aip/journal/apl/89/10/10.1063/1.2348781
2006-09-08
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Pseudoheterodyne detection for background-free near-field spectroscopy
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/10/10.1063/1.2348781
10.1063/1.2348781
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