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Near-field enhanced ultraviolet resonance Raman spectroscopy using aluminum bow-tie nano-antenna
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10.1063/1.4746747
/content/aip/journal/apl/101/11/10.1063/1.4746747
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/11/10.1063/1.4746747
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The SEM image of a 50 nm thick aluminum bow-tie antenna which is formed by two equilateral triangles of 100 nm side length with 20 nm apex to apex gap distance.

Image of FIG. 2.
FIG. 2.

The resonance Raman spectrum of liquid benzene within the near field of an aluminum bow-tie nano-antenna. The modes indicated by a “” are due to gradient-field Raman effect. The laser wavelength was 258.8 nm, the average power was 0.1 mW, the image integration time for one single measurement was 120 s, and the polarization was rotated with respect to the long bow-tie axis which was aligned to the Raman system’s default vertical polarization of excitation.

Image of FIG. 3.
FIG. 3.

The excitation-power normalized spectra from repeated measurements. The top spectrum was taken when antenna was in the focused laser spot. The middle one was also taken from a bow-tie site with a different polarization angle. The bottom spectrum was measured after moving the focus spot laterally to a region without bow-tie nano-antenna. The polarization was rotated an angle of from the long bow-tie axis. The laser wavelength was 258.8 nm. The excitation power used was in the range of . The image integration time was 120 s.

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/content/aip/journal/apl/101/11/10.1063/1.4746747
2012-09-13
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Near-field enhanced ultraviolet resonance Raman spectroscopy using aluminum bow-tie nano-antenna
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/11/10.1063/1.4746747
10.1063/1.4746747
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