Journal of Electronic Materials

, Volume 31, Issue 7, pp 802–805

Infrared spectroscopy of chromium-doped cadmium selenide

Authors

  • J. -O. Ndap
    • Center for Photonic Materials and DevicesFisk University
  • C. I. Rablau
    • Department of PhysicsWest Virginia University
  • K. Morrow
    • Center for Photonic Materials and DevicesFisk University
  • O. O. Adetunji
    • Center for Photonic Materials and DevicesFisk University
  • V. A. Johnson
    • Center for Photonic Materials and DevicesFisk University
  • K. Chattopadhyay
    • Center for Photonic Materials and DevicesFisk University
  • R. H. Page
    • Lawrence Livermore National Laboratory
  • A. Burger
    • Center for Photonic Materials and DevicesFisk University
Special Issue Paper

DOI: 10.1007/s11664-002-0240-2

Cite this article as:
Ndap, J.-., Rablau, C.I., Morrow, K. et al. Journal of Elec Materi (2002) 31: 802. doi:10.1007/s11664-002-0240-2

Abstract

The maximum optical-absorption cross section of Cr2+ ions was evaluated from near-infrared (NIR) absorption spectroscopy and direct measurements of the chromium concentration in Cr2+:CdSe crystals. The emission lifetime of the excited state, 5E, of Cr2+ was measured as a function of Cr2+ concentration in the 2×1017 −2×1018 ions/cm3 range and as a function of temperature from 77–300 K. Lifetime values were as high as ∼6 µs in the 77–250 K range and decreased to ∼4 µs at 300 K because of nonradiative decays. Assuming that most of the Cr dopant is in the Cr2+ state, an optical-absorption cross section σa of (1.94±0.56) × 10−18 cm2 was calculated. Implications for laser performance are discussed.

Key words

Cr2+:CdSeoptical-absorption cross sectiontunable solid-state lasersemission lifetime

Copyright information

© TMS-The Minerals, Metals and Materials Society 2002