PaperObservation of an optical difference frequencyArchibald W. Smith, Norman BraslauJournal of Applied Physics
PaperHarmonic generation in GaAs injection lasersJ.A. Armstrong, Marshall I. Nathan, et al.Applied Physics Letters
PaperAutoionizing states of Sr studied by the generation of tunable vacuum uv radiationJ.A. Armstrong, J.J. WynnePhysical Review Letters
PaperBound, 7snp 1P10 series in Ra I: Measurements and predictionsJ.A. Armstrong, J.J. Wynne, et al.Journal of Physics B: Atomic and Molecular Physics