title: High-density Au nanorod optical field-emitter arrays.
abstract: We demonstrate the design, fabrication, characterization, and operation of high-density arrays of Au nanorod electron emitters, fabricated by high-resolution electron beam lithography, and excited by ultrafast femtosecond near-infrared radiation. Electron emission characteristic of multiphoton absorption has been observed at low laser fluence, as indicated by the power-law scaling of emission current with applied optical power. The onset of space-charge-limited current and strong optical field emission has been investigated so as to determine the mechanism of electron emission at high incident laser fluence. Laser-induced structural damage has been observed at applied optical fields above 5 GV m(-1), and energy spectra of emitted electrons have been measured using an electron time-of-flight spectrometer.
authors.affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA.
authors.forename: R G
authors.initials: RG
authors.lastname: Hobbs
authors.forename: Y
authors.initials: Y
authors.lastname: Yang
authors.forename: P D
authors.initials: PD
authors.lastname: Keathley
authors.forename: M E
authors.initials: ME
authors.lastname: Swanwick
authors.forename: L F
authors.initials: LF
authors.lastname: Velásquez-Garcíia
authors.forename: F X
authors.initials: FX
authors.lastname: Kärtner
authors.forename: W S
authors.initials: WS
authors.lastname: Graves
authors.forename: K K
authors.initials: KK
authors.lastname: Berggren