High-density Au nanorod optical field-emitter arrays

• Main Authors: Hobbs, Richard (Contributor), Yang, Y. (Contributor), Keathley, Phillip D. (Contributor), Swanwick, Michael E. (Contributor), Velasquez-Garcia, L. F. (Contributor), Kaertner, Franz X. (Contributor), Graves, William S. (Contributor), Berggren, Karl K. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science (Contributor), Massachusetts Institute of Technology. Microsystems Technology Laboratories (Contributor), Massachusetts Institute of Technology. Research Laboratory of Electronics (Contributor), MIT Nuclear Reactor Laboratory (Contributor)
• Format: Article
• Language: English
• Published: IOP Publishing, 2015-11-09T15:16:16Z.
• Subjects: Article
• Online Access: Get fulltext

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.
United States. Defense Advanced Research Projects Agency (Contract N66001-11-1-4192)
Gordon and Betty Moore Foundation