title: Carbon nanotube photo- and electroluminescence in longitudinal electric fields.
abstract: The photoluminescence of a partially suspended, semiconducting carbon nanotube that forms the active channel of a field-effect transistor is quenched and red-shifted upon application of a longitudinal electrical (source-drain) field. The quenching can be explained by a loss of oscillator strength and an increased Auger-like nonradiative decay of the E(11) exciton. The spectral shifts are due to drain-field-induced doping that leads to enhanced dielectric screening. Electroluminescence due to electron impact excitation of E(11) excitons is red-shifted and broadened with respect to the zero-field photoluminescence. A combination of screening and heating of the carbon nanotube can explain both spectral shift and broadening of the electrically induced light emission.
authors.affiliation: IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, USA. mfreitag@us.ibm.com
authors.forename: Marcus
authors.initials: M
authors.lastname: Freitag
authors.forename: Mathias
authors.initials: M
authors.lastname: Steiner
authors.forename: Anton
authors.initials: A
authors.lastname: Naumov
authors.forename: Joshua P
authors.initials: JP
authors.lastname: Small
authors.forename: Ageeth A
authors.initials: AA
authors.lastname: Bol
authors.forename: Vasili
authors.initials: V
authors.lastname: Perebeinos
authors.forename: Phaedon
authors.initials: P
authors.lastname: Avouris