Spectrally- and polarization-resolved hyper-Rayleigh scattering measurements with polarization-insensitive detection

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10367287" target="_blank" >RIV/00216208:11310/17:10367287 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/17:10367287

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.optcom.2016.10.072" target="_blank" >http://dx.doi.org/10.1016/j.optcom.2016.10.072</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.optcom.2016.10.072" target="_blank" >10.1016/j.optcom.2016.10.072</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spectrally- and polarization-resolved hyper-Rayleigh scattering measurements with polarization-insensitive detection

Popis výsledku v původním jazyce

Determination of the molecular first hyperpolarizability by hyper-Rayleigh scattering (HRS) is usually significantly complicated by a presence of the multiphoton excited fluorescence which has to be separated from HRS to obtain a meaningful values of the hyperpolarizability. We show, by performing a spectrally-resolved measurement, that the intensity and spectral shape of the fluorescence can depend strongly on the fundamental laser wavelength. Consequently, a properly selected excitation wavelength can significantly simplify the process of separation of HRS from the detected signal. We tested the developed experimental setup with a polarization-insensitive detection by measuring HRS generated in water and in aqueous solutions of 2-aminopyrimidine (AMP) and its monocation (HAMP). The effective hyperpolarizability of AMP and HAMP was measured experimentally and compared with that obtained by quantum chemical calculations. The polarization-resolved HRS measurement was performed for AMP and the experimentally obtained depolarization ratio agrees well with that predicted theoretically, which confirms that routine density functional theory computations of static hyperpolarizability tensor components can be considered as a sufficient approach suitable for non-interacting molecules dissolved in water.

Název v anglickém jazyce

Spectrally- and polarization-resolved hyper-Rayleigh scattering measurements with polarization-insensitive detection

Popis výsledku anglicky

Determination of the molecular first hyperpolarizability by hyper-Rayleigh scattering (HRS) is usually significantly complicated by a presence of the multiphoton excited fluorescence which has to be separated from HRS to obtain a meaningful values of the hyperpolarizability. We show, by performing a spectrally-resolved measurement, that the intensity and spectral shape of the fluorescence can depend strongly on the fundamental laser wavelength. Consequently, a properly selected excitation wavelength can significantly simplify the process of separation of HRS from the detected signal. We tested the developed experimental setup with a polarization-insensitive detection by measuring HRS generated in water and in aqueous solutions of 2-aminopyrimidine (AMP) and its monocation (HAMP). The effective hyperpolarizability of AMP and HAMP was measured experimentally and compared with that obtained by quantum chemical calculations. The polarization-resolved HRS measurement was performed for AMP and the experimentally obtained depolarization ratio agrees well with that predicted theoretically, which confirms that routine density functional theory computations of static hyperpolarizability tensor components can be considered as a sufficient approach suitable for non-interacting molecules dissolved in water.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/GA14-05506S" target="_blank" >GA14-05506S: Krystalové inženýrství nových molekulárních krystalů pro nelineární optiku</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Optics Communications

ISSN

0030-4018

e-ISSN

—

Svazek periodika

388

Číslo periodika v rámci svazku

09 November 2016

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

21-28

Kód UT WoS článku

000391205700003

EID výsledku v databázi Scopus

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