Luminescence response of synthetic opal under femtosecond laser pumping

Synthetic opal is an artificial photonic metamaterial composed from spherical globules of amorphous silica (SiO2) about 300nm in diameter. We report, for the first time to our knowledge, the origin of a narrow luminescence spectral peak (4nm HWHM) and optical second and third harmonic generation in...

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Bibliographic Details
Published in:Journal of luminescence 2015-10, Vol.166, p.233-237
Main Authors: Vasnetsov, M.V., Bazhenov, V.Yu, Dmitruk, I.N., Kudryavtseva, A.D., Tcherniega, N.V.
Format: Article
Language:English
Subjects:
Femtosecond pulse excitation
Mie resonance
Nanocavity
Second harmonic generation
Synthetic opal
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Summary:Synthetic opal is an artificial photonic metamaterial composed from spherical globules of amorphous silica (SiO2) about 300nm in diameter. We report, for the first time to our knowledge, the origin of a narrow luminescence spectral peak (4nm HWHM) and optical second and third harmonic generation in synthetic opal samples under femtosecond laser excitation (800nm) at liquid-nitrogen temperature. Stimulated-emission effects are discussed related to the possibility of nanocavity lasing at the condition of the first Mie resonance in a dielectric sphere. •Second harmonic generation in a synthetic opal (amorphous material composed from spherical SiO2 globules) was observed.•Narrow luminescence peak which we assign to a Mie resonance in a globule was detected at liquid-nitrogen temperature.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2015.05.035