Probing the Phonon-Assisted Relaxation Process in DNA-wrapped Carbon Nanotubes Using Polarization Dependent Optical Spectroscopy

ORAL

Abstract

In this study, polarization-dependent spectroscopy is carried out on DNA-wrapped single walled nanotube hybrids, deposited onto a Sapphire substrate. By using a nanotube sample highly enriched in one specific (n,m) species and an intense light source, the various phonon-assisted excitonic relaxation processes, in addition to the commonly observed electronic interband transitions, can be separately identified and studied in detail. The phonon-assisted relaxation processes involving different phonon branches is emphasized in this study. The MIT authors acknowledge supports under the Dupont-MIT Alliance, NSF Grants DMR 04-05538.

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Authors

  • Shin Grace Chou

    Chemistry, MIT, Dept. of Chemistry, MIT

  • Andrew Walsh

    ECE, BU, Phys. Dept., Boston Univ., Boston University

  • Georgii Samsonidze

    EECS, MIT

  • Jie Jiang

    CREST, JST and Tohoku University

  • Riichiro Saito

    Physics, Tohoku Univ., Japan

  • Flavio Plentz

  • Ado Jorio

    Dept. of Phys., UFMG, UFMG-Brasil

  • Marcos Pimenta

    Department of Physics - UFMG, Physics, UFMG, Brazil

  • Ming Zheng

  • G. Bibiana Onoa

  • Ellen Semke

    Experimental Station, Dupont

  • Gene Dresselhaus

    Frances Bitter Magnet Lab, MIT, Fransis Bitter Magnet Laboratory, MIT

  • Mildred Dresselhaus

    MIT, Physics and EECS, MIT, Depr. of Phys., MIT

  • Anna Swan

    ECE, BU, ECE Dept., Boston Univ.

  • Bennett Goldberg

    Dept. of Physics, Boston University, Physics, BU, Department of Physics, Boston University, Phys. Dept., Boston Univ., Boston University

  • M. Selim Unlu

    Dept. of ECE, Boston University, ECE, BU, Dept. of Electrical and Computer Engineering, Boston University, Department of ECE, Boston University