Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 22: Posters: Quantum Optics and Photonics II
Q 22.18: Poster
Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof
Electron Emitter Arrays on a Chip — •Constantin Nauk, Constanze Gerner, Philip Dienstbier, and Peter Hommelhoff — Department Physik, Friedrich-Alexander-Universität Erlangen- Nürnberg (FAU), 91058 Erlangen
High-density gold tip arrays are promising candidates for femtosecond laser electron emission, suitable for a variety of applications. Single sharp tips with small radii (5-10nm) have proven good field emission characteristics such as high brightness and coherence but lack large currents. We present the current status of sharp gold tips (radii below 20nm) processed in array arrangements on a chip to face this issue. Among others, these cathodes could serve as emitters in photonics-based particle accelerators. We show the fabrication and characterization of 26 gold tips/µ m2 as well as first femtosecond laser-driven emission experiments.