Hot Carrier Cooling Study of ZnCdSe Epilayers

Der Jun Jang*, Wu-Ching Chou, Chu Shou Yang, Chie Tong Kuo, Meng En Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The hot carrier dynamics of ZnCdSe epilayers were studied using the femtosecond time-resolved photoluminescence up-conversion technique. The hot carriers release the excess energy primarily through scattering with longitudal optical phonons. The optical phonon emission times of the hot carriers were fitted from the carrier cooling curves and found to be 40 ps for both samples with different Cd concentrations. The initial temperature To was estimated below the theoretical calculation due to the fact that these hot carriers reach thermal equilibrium in a time scale faster than the experimental temporal resolution. The hot phonon effect is not prominent in the present work for the excitation density of 1017 cm-3.

Original languageEnglish
Pages (from-to)7370-7372
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume42
Issue number12
DOIs
StatePublished - 1 Dec 2003

Keywords

  • Energy relaxation
  • Hot carrier
  • Optical phonon
  • Semiconductor
  • Ultrafast laser spectroscopy
  • ZnCdSe

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