Structure of whispering gallery mode spectrum of microspheres coated with fluorescent silicon quantum dots

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10173453" target="_blank" >RIV/00216208:11320/13:10173453 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1364/JOSAB.30.003079" target="_blank" >http://dx.doi.org/10.1364/JOSAB.30.003079</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/JOSAB.30.003079" target="_blank" >10.1364/JOSAB.30.003079</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structure of whispering gallery mode spectrum of microspheres coated with fluorescent silicon quantum dots

Popis výsledku v původním jazyce

Whispering gallery modes (WGMs) in microspheres containing embedded fluorophores (e.g., organic dyes or quantum dots) may find refractometric sensing or microlasing applications. However, there have been relatively few investigations on the relationshipbetween the intrinsic microsphere resonances and the WGMs observed in fluorescence spectra for emitters coupled to the microsphere. Here we find that an apparently simple fluorescence WGM spectrum can mask a much more complicated underlying microcavity mode structure and that the observed fluorescence spectra are controlled by the emitter linewidth. By examining the cavity structure, we also verify that an effective ensemble emitter linewidth can be extracted from the fluorescence data. Finally, spectral diffusion is suggested as a possible origin of the periodic fluorescence WGM spectra observed in many microsphere cavities, without which these resonances might be unobservable. (C) 2013 Optical Society of America

Název v anglickém jazyce

Structure of whispering gallery mode spectrum of microspheres coated with fluorescent silicon quantum dots

Popis výsledku anglicky

Whispering gallery modes (WGMs) in microspheres containing embedded fluorophores (e.g., organic dyes or quantum dots) may find refractometric sensing or microlasing applications. However, there have been relatively few investigations on the relationshipbetween the intrinsic microsphere resonances and the WGMs observed in fluorescence spectra for emitters coupled to the microsphere. Here we find that an apparently simple fluorescence WGM spectrum can mask a much more complicated underlying microcavity mode structure and that the observed fluorescence spectra are controlled by the emitter linewidth. By examining the cavity structure, we also verify that an effective ensemble emitter linewidth can be extracted from the fluorescence data. Finally, spectral diffusion is suggested as a possible origin of the periodic fluorescence WGM spectra observed in many microsphere cavities, without which these resonances might be unobservable. (C) 2013 Optical Society of America

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BH - Optika, masery a lasery

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Journal of the Optical Society of America B: Optical Physics

ISSN

0740-3224

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

3079-3085

Kód UT WoS článku

000326580500042

EID výsledku v databázi Scopus

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