title: Figure of Merit for Carbon Nanotube Photothermoelectric Detectors.
abstract: Carbon nanotubes (CNTs) have emerged as promising materials for visible, infrared, and terahertz photodetectors. Further development of these photodetectors requires a fundamental understanding of the mechanisms that govern their behavior as well as the establishment of figures of merit for technology applications. Recently, a number of CNT detectors have been shown to operate based on the photothermoelectric effect. Here we present a figure of merit for these detectors, which includes the properties of the material and the device. In addition, we use a suite of experimental characterization methods for the thorough analysis of the electrical, thermoelectric, electrothermal, and photothermal properties of the CNT thin-film devices. Our measurements determine the quantities that enter the figure of merit and allow us to establish a path toward future performance improvements.
authors.affiliation: Sandia National Laboratories , Livermore, California 94551, United States.
authors.forename: Kristopher J
authors.initials: KJ
authors.lastname: Erikson
authors.forename: Xiaowei
authors.initials: X
authors.lastname: He
authors.affiliation: Sandia National Laboratories , Livermore, California 94551, United States.
authors.forename: A Alec
authors.initials: AA
authors.lastname: Talin
authors.affiliation: Sandia National Laboratories , Livermore, California 94551, United States.
authors.forename: Bernice
authors.initials: B
authors.lastname: Mills
authors.forename: Robert H
authors.initials: RH
authors.lastname: Hauge
authors.affiliation: Quantum Nano-electronics Research Center, Department of Physical Electronics, Tokyo Institute of Technology , Meguro-ku, Tokyo 152-8552, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Iguchi
authors.affiliation: Quantum Nano-electronics Research Center, Department of Physical Electronics, Tokyo Institute of Technology , Meguro-ku, Tokyo 152-8552, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Fujimura
authors.affiliation: Quantum Nano-electronics Research Center, Department of Physical Electronics, Tokyo Institute of Technology , Meguro-ku, Tokyo 152-8552, Japan.
authors.forename: Yukio
authors.initials: Y
authors.lastname: Kawano
authors.forename: Junichiro
authors.initials: J
authors.lastname: Kono
authors.affiliation: Sandia National Laboratories , Livermore, California 94551, United States.
authors.forename: François
authors.initials: F
authors.lastname: Léonard
keywords: Joule heating; carbon nanotubes; photodetector; photothermoelectric; thermoelectric