John Collins
Wheaton College (Massachusetts)
52 Papers
131 Citations
John Collins is an academic researcher from Wheaton College (Massachusetts). The author has contributed to research in topics: Luminescence & Spectroscopy. The author has an hindex of 11, co-authored 48 publications. Previous affiliations of John Collins include Wheaton College (Illinois).
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Papers
Random nanostructured metallic films for environmental monitoring and optical sensing: experimental and computational studies.
Ivan Karbovnyk,John Collins,Ivan Bolesta,Andriy Stelmashchuk,Antonina Kolkevych,Shereen Velupillai,Halyna Klym,Orest Fedyshyn,Svitlana Tymoshuk,Ihor Kolych +9 more
TL;DR: Nanostructured silver films are studied using computational and experimental methods for surface plasmon resonance-related phenomena and amplification of light at the film surface due to local electromagnetic field enhancement at the nanoscale is discussed.
Dependence of cross-relaxation on temperature and concentration from the 1D2 level of Pr3+ in YPO4
TL;DR: In this paper, the role of cross-relaxation in the decay of the 1 D 2 level of trivalent pr in YPO 4 in crystals with Pr concentrations of 0.1, 1, 2, and 5% was investigated.
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Non-Radiative Processes in Crystals and in Nanocrystals
TL;DR: In this paper, non-radiative processes that are relevant to the luminescence characteristics of optically active ions doped into insulators or large-gap semiconductors, with particular attention to how these processes are affected as the particle size is reduced from bulk single crystals to as small as a few nanometers.
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On the efficient warm white-light emission from nano-sized Y2O3
TL;DR: In this article, the authors consider the reported emission of white light (WL) in the spectral range from 400 to beyond 900 nm induced by monochromatic infrared light (803.5 and 975 nm) continuous wave excitation of nominally un-doped yttrium oxide (Y 2 O 3 ) nano-powders.
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