Influences of light intensity on fluorescence lifetime of nanorods and quantum dots | Zendy

YiCheun Yeh | Zendy; ChiTsu Yuan | Zendy; ChiaCheng Kang | Zendy; PiTai Chou | Zendy; Jau Tang | Zendy

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Influences of light intensity on fluorescence lifetime of nanorods and quantum dots

Author(s) -

YiCheun Yeh,

ChiTsu Yuan,

ChiaCheng Kang,

PiTai Chou,

Jau Tang

Publication year - 2008

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3021366

Subject(s) - nanorod , quantum dot , fluorescence , light intensity , intensity (physics) , optoelectronics , materials science , photon , photon counting , optics , nanotechnology , physics

In this letter we investigate light-intensity dependence of the fluorescence lifetime for CdSe nanorods (NRs) and quantum dots (QDs) measured by time-correlated single photon counting techniques. We report extremely narrow lifetime distribution for NRs as the light intensity increases, although the change for QDs is not so pronounced. In addition, the averaged lifetimes for NRs and QDs all become shortened at higher light intensities. Some possible mechanisms for these effects are discussed.

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