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Updated: Jun 20, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
Selective two-step photoionization of F-aggregate centers using 1.06-microm radiation
Abstract:
A two-step photoionization of several potentially laser-active F-aggregate centers is observed in additively colored crystals by using high-intensity 1.06-microm pulses from a Q-switched Nd:YAG laser. The centers produced include the lithium (F(2)(+))(A) center in KI, which has lased with tunability from 2.4 to 4.0 microm, and N(1) (+) centers in KBr, which show promise of lasing. Steady-state concentrations of ionized (F(2)(+))(A) and N(1) (+) centers are found to be considerably larger than those produced by using blue or near-ultraviolet excitation.
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