Zobrazeno 1 - 10
of 31
pro vyhledávání: '"D. A. Mantell"'
Autor:
Antti Mäkinen, Yongli Gao, Z. Zhang, S. J. Diol, A. A. Muenter, S. Xu, M. G. Mason, Andrew R. Melnyk, D. A. Mantell
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 17:2329-2332
We have studied the lifetimes of the excited electron states of thin N,N′bis(phenethyl)perylene-3,4:9,10-bis(dicarboximide) (DPEP) films, prepared in situ, using femtosecond time-resolved photoemission spectroscopy. DPEP is an organic compound simi
Publikováno v:
Physical Review B. 58:10948-10952
The energy-dependent relaxation of photoexcited electrons has been measured by time-resolved two-photon photoemission spectroscopy on single-crystal Au~111! films with thickness ranging from 150 to 3000 A. It is found that the energy-dependent relaxa
Publikováno v:
Physical Review B. 56:1099-1102
The energy dependence of the relaxation of photoexcited electrons in copper was measured using femtosecond time-resolved photoemission spectroscopy to within 0.3 eV above the Fermi level. By performing lifetime measurements under different surface co
Autor:
A. A. Muenter, Bruce A. Parkinson, S. J. Diol, L. I. Sharp, R. J. D. Miller, C. C. Miller, S. Xu, M. G. Mason, Yongli Gao, D. A. Mantell
Publikováno v:
Chemical Physics Letters. 272:209-218
We performed femtosecond two-photon photoemission studies of SnS2, and measured the lifetime of electrons in the conduction band at different excitation energies. The lifetime is short (⩽ 60 fs) even at the conduction band minimum. In addition, the
Autor:
Jianming Cao, S. J. Diol, Charles A. Schmuttenmaer, R. J. Dwayne Miller, D. A. Mantell, C. C. Miller, Yongli Gao
Publikováno v:
Journal of Physics D: Applied Physics. 30:1427-1431
MBE grown GaAs (100) surface quantum wells were studied using time-resolved two-photon photoemission spectroscopy where the electron distribution was directly determined. Relaxation lifetimes from 50 to 450 fs were measured and were found to be depen
Autor:
C. C. Miller, S. J. Diol, Charles A. Schmuttenmaer, D. A. Mantell, R. J. D. Miller, Jianming Cao, Yongli Gao
Publikováno v:
Journal of Physics D: Applied Physics. 30:1416-1420
We observed that GaAs surface quantum wells on undoped AlGaAs substrates experienced a reverse surface photovoltage (RSPV) that caused the bands to bend upward when illuminated by femtosecond laser pulses for time-resolved two-photon photoemission sp
Autor:
Bruce A. Parkinson, Jianming Cao, R. J. D. Miller, D. A. Mantell, C. C. Miller, M. G. Mason, S. Xu, Yongli Gao, A. A. Muenter
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 15:1510-1514
By using the femtosecond two photon photoemission technique, we directly measured the lifetimes of photoexcited electrons in two layered materials, graphite and SnS2. The inverse lifetimes of photoexcited electrons in these two-dimensional layered ma
Autor:
R. J. D. Miller, J. W. Herman, D. A. Mantell, C. A. Schmuttenmaer, C. C. Miller, Jianming Cao, Yongli Gao
Publikováno v:
Chemical Physics. 205:91-108
Time-resolved two-photon photoemission spectroscopy is used to study the relaxation of hot electrons as a function of excitation energy for a variety of device grade and molecular beam epitaxial grown GaAs(100) surfaces. Relaxation times ranging from
Autor:
Yongli Gao, Martin Aeschlimann, M Scheinfein, Jianming Cao, Edward L. Hull, Charles A. Schmuttenmaer, L. G. Jahn, D. A. Mantell, Hani E. Elsayed-Ali
Publikováno v:
Review of Scientific Instruments. 66:1000-1009
Theoretical and experimental investigations for a new design of an ultrashort pulsed laser activated electron gun for time resolved surface analysis are described. In addition, a novel electron detection and image analysis system, as it applies speci
Autor:
R. J. D. Miller, Hani E. Elsayed-Ali, C. A. Schmuttenmaer, D. A. Mantell, Martin Aeschlimann, Yongli Gao, Jianming Cao
Publikováno v:
Physical Review B. 50:8957-8960
A time-domain measurement of the relaxation time of photoexcited electrons as a function of excitation energy at a single-crystal Cu(100) surface has been made with time-resolved two-photon photoemission. The relaxation lifetime of the excited electr