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Title: Surface states controlled broadband enhancement of two-photon absorption

We demonstrate the controllable broadband enhancement of two-photon absorption in a wide spectral range from 710 nm to 960 nm by controlling the surface states of aqueous Co{sup 2+} doped CdTe quantum dots, which is consistent with the measurement results of surface potential and fluorescence decay. The enhancement can be tuned in the range between 1 and 1.7 by changing the dopant concentrations that determine the surface states.
Authors:
; ; ; ; ; ;  [1]
  1. Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096 (China)
Publication Date:
OSTI Identifier:
22253871
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 23; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; CADMIUM TELLURIDES; COBALT IONS; DOPED MATERIALS; FLUORESCENCE; PHOTONS; QUANTUM DOTS; SURFACE POTENTIAL; SURFACES