Ultrafast laser-induced electron emission from multiphoton to optical tunneling

• Main Authors: Pant, M., Ang, Ricky Lay Kee
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
• Online Access: https://hdl.handle.net/10356/95464; http://hdl.handle.net/10220/9126
• Institution: Nanyang Technological University

Based on a time-dependent quantum model, a relation between the onset of the optical tunneling regime and the metal work function is determined. In the multiphoton regime, the number of photons required for absorption is reduced from n=3 (at pulse length τ>20 fs) to n=2 (at τ<8 fs) due to the...