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Pump-probe scanning near field optical microscopy: Sub-wavelength resolution chemical imaging and ultrafast local dynamics
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10.1063/1.3701724
/content/aip/journal/apl/100/15/10.1063/1.3701724
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/15/10.1063/1.3701724
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Figures

Image of FIG. 1.
FIG. 1.

The experimental setup: An inverted microscope focuses the light through the glass substrate into the organic layer. The SNOM accesses the layer from the top. For scanning, the sample is moved using a piezo controlled XYZ translator.

Image of FIG. 2.
FIG. 2.

Time profile of transient absorbtion of the probe laser at 650 nm, at different pump (520 nm) intensities at the maximum of the focal spot (a), and at different points in the focal spot area (b).

Image of FIG. 3.
FIG. 3.

SNOM image of a 160 nm film of PTCDA, displaying transient absorption of the probe pulse at 650 nm, 200 fs after the pump excitation at 520 nm (a), and AFM topography (b).

Image of FIG. 4.
FIG. 4.

SNOM images of a 160 nm film of PTCDA displaying absorption of the probe pulse at 650 nm, 200 fs after the pump excitation at 520 nm (a), and without pump excitation (b). The images were taken without accumulation of laser pulses (single shot data points).

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/content/aip/journal/apl/100/15/10.1063/1.3701724
2012-04-09
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Pump-probe scanning near field optical microscopy: Sub-wavelength resolution chemical imaging and ultrafast local dynamics
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/15/10.1063/1.3701724
10.1063/1.3701724
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