• About
  • Policies
  • What is open access
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Science
      • Department of Physics
      • View Item
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Science
      • Department of Physics
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Excited-state dynamics and nonlinear optical response of Ge nanocystals embedded in silica matrix

      Thumbnail
      View / Download
      180.9 Kb
      Author(s)
      Razzani, L.
      Gnoli, A.
      Righini, M.
      Dana, A.
      Aydınlı, Atilla
      Date
      2006-05-01
      Source Title
      Applied Physics Letters
      Print ISSN
      0003-6951
      Publisher
      A I P Publishing LLC
      Volume
      88
      Issue
      18
      Pages
      181901-1 - 181901-3
      Language
      English
      Type
      Article
      Item Usage Stats
      155
      views
      157
      downloads
      Abstract
      We use a dedicated Z-scan setup, arranged to account for cumulative effects, to study the nonlinear optical response of Ge nanocrystals embedded in silica matrix. Samples are prepared with plasma-enchanced chemical-vapor deposition and post-thermal annealing. We measure a third-order nonlinear refraction coefficient of gamma=1x10(-16) m(2)/W. The nonlinear absorption shows an intensity-independent coefficient of beta=4x10(-10) m/W related to fast processes. In addition, we measure a second beta component around 10(-9) m/W with a relaxation time of 300 mu s that rises linearly with the laser intensity. We associate its origin to the absorption of excited carriers from a surface-defect state with a long depopulation time.
      Keywords
      Germanium Nanocrystals
      Permalink
      http://hdl.handle.net/11693/11561
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.2201550
      Collections
      • Department of Physics 2550
      Show full item record

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsCoursesThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsCourses

      My Account

      Login

      Statistics

      View Usage StatisticsView Google Analytics Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 2976
      © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy