Quantitative absorption spectra of quantum wires measured by analysis of attenuated internal emissions

Masahiro Yoshita, Takayuki Okada, Hidefumi Akiyama, Makoto Okano, Toshiyuki Ihara, Loren N. Pfeiffer, Ken W. West

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Abstract

An absorption-spectroscopy method that utilizes internal emissions as the source of the probe light was used to measure the absorption spectra of quasi-one-dimensional (q-1D) excitons in T-shaped quantum wires embedded in an optical waveguide. The modal absorption area of the 1D ground-state excitons was estimated to be 0.39 eV cm -1 and was almost independent of temperature in the range 4-150 K. Quantitative evaluation using the absorption spectra revealed that the absorption cross-section per unit length at resonance peak and the spectrally integrated absorption cross-section area per unit length of the 1D ground-state excitons were 1.0 nm and 2.5×10 -3eV nm, respectively.

Original languageEnglish
Article number112101
JournalApplied Physics Letters
Volume100
Issue number11
DOIs
Publication statusPublished - 2012 Mar 12
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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