Two-Color Multiphoton Emission from Nanotips

Authors

Wayne Cheng-Wei Huang, Texas A & M University - College StationFollow
Maria Becker, University of Nebraska-Lincoln
Joshua Beck, University of Nebraska-LincolnFollow
Herman Batelaan, University of Nebraska - LincolnFollow

Date of this Version

2-2-2017

Citation

W. C. Huang, M. Becker, J. Beck, and H. Batelaan. Two-color Multiphoton Emission from Nanotips, New J. Phys. 19, 023011 (2017).

https://doi.org/10.1088/1367-2630/aa58bb

Comments

Creative Commons Attribution 3.0 licence.

Abstract

Two-color multiphoton emission from polycrystalline tungsten nanotips has been demonstrated using two-color laser fields. The two-color photoemission is assisted by a three-photon multicolor quantum channel, which leads to a twofold increase in quantum efficiency. Weak-field control of two- color multiphoton emission was achieved by changing the efficiency of the quantum channel with pulse delay. The result of this study complements two-color tunneling photoemission in strong fields, and has potential applications for nanowire-based photonic devices. Moreover, the demonstrated two-color multiphoton emission may be important for realizing ultrafast spin-polarized electron sources via optically injected spin current.