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Title: Enhanced photoluminescence due to two-photon enhanced three-photon absorption in Mn{sup 2+}-doped ZnS quantum dots

In this work, we have investigated the multi-photon absorption induced photoluminescence in Mn{sup 2+}-doped ZnS quantum dots in the wavelength range 860 – 1050 nm (Near-Infrared Window I). The observed three-photon action cross-section has been compared with the theoretical prediction under four band approximation. An enhancement of four to five orders has been observed in the range from 970 to 1050 nm compared to the theoretical value, which is attributed to two-photon enhanced three-photon absorption. Transient lifetime measurements reveal a lifetime of 0.35 ± 0.3 ms, which is four to five orders higher than other conventional fluorescent probes.
Authors:
 [1] ; ;  [2] ;  [3] ;  [4]
  1. Department of Physics, Indian Institute of Technology, Madras, Chennai, 600036, India and Department of Physics, National University of Singapore (NUS), 2 Science Drive 3, Singapore, 117542 (Singapore)
  2. Department of Physics, National University of Singapore (NUS), 2 Science Drive 3, Singapore, 117542 (Singapore)
  3. School of Physics and Electronic Information Technology, Yunnan Normal University (China)
  4. Department of Physics, Indian Institute of Technology, Madras, Chennai, 600036 (India)
Publication Date:
OSTI Identifier:
22308022
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1620; Journal Issue: 1; Conference: Optics 14: International conference on optics: Light and its interactions with matter, Calicut, Kerala (India), 19-21 Mar 2014; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION; COMPARATIVE EVALUATIONS; CROSS SECTIONS; DOPED MATERIALS; FLUORESCENCE; LIFETIME; MANGANESE IONS; MULTI-PHOTON PROCESSES; PHOTOLUMINESCENCE; PHOTONS; QUANTUM DOTS; TRANSIENTS; ZINC SULFIDES