High-density Au nanorod optical field-emitter arrays
Author(s)Hobbs, Richard; Yang, Y.; Keathley, Phillip D.; Swanwick, Michael E.; Velasquez-Garcia, L. F.; Kaertner, Franz X.; Graves, William S.; Berggren, Karl K.; ... Show more Show less
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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[superscript −1], and energy spectra of emitted electrons have been measured using an electron time-of-flight spectrometer.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Microsystems Technology Laboratories; Massachusetts Institute of Technology. Research Laboratory of Electronics; MIT Nuclear Reactor Laboratory
Hobbs, R G, Y Yang, P D Keathley, M E Swanwick, L F Velasquez-Garcia, F X Kartner, W S Graves, and K K Berggren. “High-Density Au Nanorod Optical Field-Emitter Arrays.” Nanotechnology 25, no. 46 (October 30, 2014): 465304.
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