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Spectral variations in background light emission of surface-enhanced resonance hyper Raman scattering coupled with plasma resonance of individual silver nanoaggregates
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10.1063/1.3489920
/content/aip/journal/jcp/133/12/10.1063/1.3489920
http://aip.metastore.ingenta.com/content/aip/journal/jcp/133/12/10.1063/1.3489920
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Optical setup for measurement of plasma resonance spectra, (b) of SERHRS spectra, and (c) of SERRS spectra.

Image of FIG. 2.
FIG. 2.

(a) Typical SERHRS and background light emission spectra from a single Ag nanoaggregate. (b) and (c) Expanded spectra around and , respectively.

Image of FIG. 3.
FIG. 3.

(a)–(d) Ag nanoaggregate-by-nanoaggregate variations in background light emission spectra of SERHRS from four Ag nanoaggregates. (e) Hyper Rayleigh scattering spectra from a Ag nanoaggregate not showing SERHRS. (f) Two-photon excited fluorescence spectrum from a R6G aqueous solution . Detection time of each spectrum is 5 s.

Image of FIG. 4.
FIG. 4.

(a1–a3, b1–b3, c1–c3) Temporal variations in background light emission spectra of SERHRS for three Ag nanoaggregates under continuous laser excitation. Detection time of each spectrum is 5 s and the total excitation time is 15 s for each Ag nanoaggregate.

Image of FIG. 5.
FIG. 5.

(a) Polarization dependence of plasma resonance spectra of a single Ag nanoaggregate. (b) Polarization dependence of SERHRS of the single Ag nanoaggregate. (c) Polarization dependence of the maximum intensities of longitudinal (closed circles fitted with a broken line) and transverse (open circles fitted with a solid line) plasma resonance bands. (d) Polarization-angle dependence of the maximum intensity of a longitudinal plasma resonance band (a broken line), intensity of SERHRS at 570 nm (open circles), and intensity of background light emission of SERHRS at 620 nm (a solid line with open squares).

Image of FIG. 6.
FIG. 6.

(a1–d1) Plasma resonance spectra (solid lines) and fitted lines with Lorentz functions (red broken lines) from four Ag nanoaggregates. (a2–d2) Background light emission spectra of SERHRS from four Ag nanoaggregates. Each Ag nanoaggregate in a1–d1 corresponds to each one in a2–d2, respectively. (a3–d3) Calculated background light emission spectra of SERHRS by products of the spectra in (f) and the fitted lines in a1–d1. (e) Spectral intensity ratios at 700–600 nm of background light emissions obtained from eight Ag nanoaggregates plotted as a function of plasma resonance wavelength (open circles) and a calculated curve (solid line). (f) SERHRS (black line) and plasma resonance (gray line) spectra from a large Ag microaggregate (inset: SERHRS emission image).

Image of FIG. 7.
FIG. 7.

(a1–a3, b1–b3) Temporal variations in plasma resonance spectra for two Ag nanoaggregates induced by SERHRS excitation laser irradiation. (a4–a6, b4–b6) Temporal variations in background light emission spectra of SERHRS for two Ag nanoaggregates. Each Ag nanoaggregate in a1–a3 and b1–b3 corresponds to each one in a4–a6 and b4–b6, respectively. (a1 and b1) Plasma resonance spectra measured before laser irradiation. (a2, b2 and a3, b3) Plasma resonance spectra measured after 5 and 10 s laser irradiation. (a4, b4) Background light emission spectra measured by laser excitation during 0–5 s. (a5, b5 and a6, b6) Background light emission spectra measured by laser excitation during 5–10 s and 10–15 s. (a7–a9, b7–b9) Calculated background light emission spectra by product of the spectra [Fig. 6(f) ] and the fitted lines in (a1–a3, b1–b3).

Image of FIG. 8.
FIG. 8.

(a1–c1) Background light emission spectra of SERHRS from four Ag nanoaggregates. (a2–c2) Background light emission spectra of SERRS spectra from four Ag nanoaggregates. Each Ag nanoaggregate in a1–c1 corresponds to each one in a2–c2, respectively.

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/content/aip/journal/jcp/133/12/10.1063/1.3489920
2010-09-24
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spectral variations in background light emission of surface-enhanced resonance hyper Raman scattering coupled with plasma resonance of individual silver nanoaggregates
http://aip.metastore.ingenta.com/content/aip/journal/jcp/133/12/10.1063/1.3489920
10.1063/1.3489920
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