Whispering gallery modes in intrinsic TiO 2  microspheres coupling to the defect‐related photoluminescence after visible excitation | Zendy

Paunoiu Andreea | Zendy; Moirangthem Rakesh Singh | Zendy; Erbe Andreas | Zendy

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Whispering gallery modes in intrinsic TiO 2 microspheres coupling to the defect‐related photoluminescence after visible excitation

Author(s) -

Paunoiu Andreea,

Moirangthem Rakesh Singh,

Erbe Andreas

Publication year - 2015

Publication title -

physica status solidi (rrl) – rapid research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.786

H-Index - 68

eISSN - 1862-6270

pISSN - 1862-6254

DOI - 10.1002/pssr.201510012

Subject(s) - photoluminescence , anatase , whispering gallery wave , materials science , dopant , visible spectrum , photoluminescence excitation , excitation , titanium , sol gel , optics , optoelectronics , nanotechnology , photocatalysis , chemistry , doping , resonator , physics , organic chemistry , catalysis , quantum mechanics , metallurgy

Defect‐caused visible photoluminescence after visible excitation in anatase TiO 2 microresonators couples to whispering gallery modes (WGMs). Spherical anatase TiO 2 of a radius between 1.5 µm and 4 µm have been prepared by a sol–gel technique based on hydrolysis of titanium tetrabutoxide. The observation of WGMs in intrinsic anatase TiO 2 without additional dopant offers new perspectives for the localisation of light at TiO 2 surfaces for the design of photocatalysts.WGMs show up as narrow peaks in the photoluminescence spectra of TiO 2 microparticles after visible excitation. (© 2015 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)

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