title: Absorption cross section and interfacial thermal conductance from an individual optically excited single-walled carbon nanotube.
abstract: The heat generation and dissipation of an individual optically excited metallic single-walled carbon nanotube is characterized using a thermal sensor thin film of Al(0.94)Ga(0.06)N embedded with Er(3+). The absorption cross section from an individual SWCNT excited at 532 nm is revealed from the steady-state temperature of the thermal sensor film. A maximum temperature of 4.3 K is observed when the SWCNT is excited with parallel polarization and an average intensity of 7 × 10(10) W/m(2). From this temperature measurement, we determine an absorption cross section for the SWCNT of 9.4 × 10(-17) m(2)/μm using parallel polarization and 2.4 × 10(-17) m(2)/μm for perpendicular polarization. We establish a temperature difference between the SWCNT and the substrate of 315 K by converting the G band shift of the SWCNT into the local SWCNT temperature and scaling the measured film temperature to the local non-resolution-limited temperature rise. From the temperature difference and heat flux, we deduce a value of 6.6 MW/m(2)·K for the thermal interfacial conductance of a SWCNT sitting on a thin film of amorphous Al(0.94)Ga(0.06)N.
authors.affiliation: Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, USA.
authors.forename: Dan
authors.initials: D
authors.lastname: Wang
authors.forename: Michael T
authors.initials: MT
authors.lastname: Carlson
authors.forename: Hugh H
authors.initials: HH
authors.lastname: Richardson
mesh_terms: D000042:Absorption; D006358:Hot Temperature; D037742:Nanotubes, Carbon; D055095:Optics and Photonics; D013059:Spectrum Analysis, Raman
chemical_list: D037742:Nanotubes, Carbon