Publications

- Why Kastner analysis does not apply to a modified Afshar experiment
E. Flores and E. Knoesel, Proceedings of SPIE -- Volume 6664, The Nature of Light: What Are Photons?, Chandrasekhar Roychoudhuri, Al F. Kracklauer, Katherine Creath, Editors, 66640O (Aug. 31, 2007)

- Paradox in wave-particle duality
S.S. Afshar, E. Flores, K.F. McDonald, E. Knoesel (2007), Foundations of Physics 37 (2): 295-305 (2007).

- Variable Electron-Phonon Coupling in Isolated Metallic Carbon Nanotubes Observed by Raman Scattering
Y. Wu, J. Maultzsch, E. Knoesel, B. Chandra, M. Huang, M. Y. Sfeir, L. E. Brus, J. Hone, and T. F. Heinz, Phys. Rev. Lett. 99, 027402 (2007).We report the existence of broad and weakly asymmetric features in the high-energy (G) Raman modes of freely suspended metallic carbon nanotubes of defined chiral index. A significant variation in peak width (from 12  cm^-1 to 110  cm^-1) is observed as a function of the nanotube’s chiral structure. When the nanotubes are electrostatically gated, the peak widths decrease. The broadness of the Raman features is understood as the consequence of coupling of the phonon to electron-hole pairs, the strength of which varies with the nanotube chiral index and the position of the Fermi energy.

- Growth and structural properties of Bi(Fe_xSc_1-x)O₃ thin films
M. Murakami;  M. A. Aronova;  M. Wuttig;  I. Takeuchi;  S. Trolier-McKinstry;  K. McDonald;  E. Knoesel;  S. E. Lofland;  T. Chikyow;  T. Aoyama; K. Nakajima, Philosophical Magazine Letters 87( 3), 241 – 247(2007).

- Epitaxy, texturing and second-harmonic generation in BiFeO₃ thin films
S.E. Lofland, K. F. McDonald, C.J. Metting, E. Knoesel, M. Murakami, M. Aranova, and I. Takeuchi, Phys. Rev. B 73, 092408 (2006).

- Large Second Harmonic Kerr rotation in GaFeO₃ thin films on YSZ buffered Silicon.
D. C. Kundaliya, S. B. Ogale, S. Dhar, K. F. McDonald, E. Knoesel, T. Osedach, S. E. Lofland, S. R. Shinde and T. Venkatesan, J. Magn. Magn. Mater. 299, 307-311 (2006).

- Observation of rapid Auger recombination in optically excited semiconducting carbon nanotubes
Feng Wang, Gordana Dukovic, Ernst Knoesel, Louis E. Brus, and Tony F. Heinz, Physical Review B 70, 241403 (2004).

- Real-Space Observation of Molecular Motion Induced by Femtosecond Laser Pulse
Ludwig Bartels, Feng Wang, Dietmar Möller, Ernst Knoesel, and Tony F. Heinz; Science 305: 648-651 (2004).

- Optical reflectance of blue bronze crystals near the Peierls transition
Ernst Knoesel, Greg J. Guyon, Keith F. McDonald, Samuel E. Lofland, Kandalam V. Ramanujachary, William H. McCarroll, Solid State Communications 130, 613-617 (2004).

- Conductivity of solvated electrons in hexane investigated with terahertz time-domain spectroscopy
Ernst Knoesel, Mischa Bonn, Jie Shan, Feng Wang; Tony F Heinz, Journal of Chemical Physics, 121(1) p394 (2004).

- Quantative study of adsorbate-adsorbate interactions of hydrogen on the Si(100) surface
Zonghai Hu, Albert Biedermann, Ernst Knoesel, Tony F. Heinz, Phys. Rev. B 68 (15): Art. No. 155418 (2003).

- Measurement of the Frequency-Dependent Conductivity in Sapphire
Jie Shan, Feng Wang, Ernst Knoesel, Mischa Bonn, Tony F. Heinz; Phys. Rev. Lett. 90, 247401 (2003).

- Destructive interference of freely propagating THz pulses and its potential for high-resolution spectroscopy and optical computing
V. Grebenev, E. Knoesel, L. Bartels; Appl. Phys. Lett. 79(2) 145-147 (2001).

- Dynamics of solvated electrons in n-hexane studied with picosecond THz time-domain spectroscopy
E. Knoesel, M. Bonn, J. Shan, T.F. Heinz; Phys. Rev. Lett. 86(2) 340-343 (2001).

- Single-shot measurement of terahertz electromagnetic pulses using electro-optic sampling
J. Shan, A.S. Weling, E. Knoesel, L. Bartels, M. Bonn, G.A. Reider, T.F. Heinz; Opt. Lett. 25(6) 426-428 (2000).

- THz pump-probe measurements of electrons in non-polar liquids
E. Knoesel, J. Shan, M. Bonn, M. Wolf, T.F. Heinz, Ultrafast Phenomena XII, (Springer, Berlin, 2000) p. 459.

- Dissociative adsorption of H-2 on Si(100) induced by atomic H
A. Biedermann, E. Knoesel, Z. Hu and T. F. Heinz; Phys. Rev. Lett. 83(9) 1810-1813 (1999).

- Observation of a direct transition in the sp-band of Cu(111) and (sqrt3 x sqrt3)R30-CO/Cu(111) in one- and two-photon photoemission
D. Velic, E. Knoesel, M. Wolf, Surf. Sci. 424(1) 1-6 (1999).

- Direct and indirect excitation mechanisms in two-photon photoemission spectroscopy of Cu(111) and CO/Cu(111)
M. Wolf, A. Hotzel, E. Knoesel, D. Velic; Phys. Rev. B 59(8) 5926-5935 (1999).

- Ultrafast dynamics of hot electrons and holes in copper: Excitation, energy relaxation, and transport effects
E. Knoesel, A. Hotzel, M. Wolf ; Phys. Rev. B 57(20) 12812-12824 (1998).

- Temperature dependence of surface state lifetimes, dephasing rates and binding energies
on Cu(111) studied with time-resolved photoemission
E. Knoesel, A. Hotzel, M. Wolf ; J. Electron Spectrosc. 88 577-584 (1998).

- Can we control lifetimes of electronic states at surfaces by adsorbate resonances?
A. Hotzel, K. Ishioka, E. Knoesel, M. Wolf, G. Ertl; Chem. Phys. Lett. 285(3-4) 271-277 (1998).

- Dynamics of electron-induced manipulation of individual CO molecules on Cu(111)
L. Bartels, G. Meyer, K.-H. Rieder, D. Velic, E. Knoesel, A. Hotzel, M. Wolf, G. Ertl; Phys. Rev. Lett. 80(9) 2004-2007 (1998).

- Femtosecond time-resolved photoemission of electron dynamics in surface Rydberg states
T. Hertel, E. Knoesel, A. Hotzel, M. Wolf, G. Ertl; J. Vac. Sci. Technol. A 15(3) 1503-1509 (1997).

- Dynamics of photoexcited electrons in metals studied with time-resolved two-photon photoemission
E. Knoesel, A. Hotzel, T. Hertel, M. Wolf, G. Ertl; Surf. Sci. 368 76-81 (1996).

- Time-resolved two-color photoelectron spectroscopy of clean and adsorbate covered metal surfaces
T. Hertel, E. Knoesel, M. Wolf, G. Ertl; Ultrafast Phenomena X (Springer, Berlin, 1996) p. 448.

- Ultrafast dynamics of electrons in image-potential states on clean and Xe-covered Cu(111)
M. Wolf, E. Knoesel, T. Hertel; Phys. Rev. B 54 (8) R5295-R5298 (1996).

- Femtosecond electron dynamics at clean and CO covered Cu(111) surfaces
M. Wolf, T. Hertel, E. Knoesel, G. Ertl; Femtochemistry, Ultrafast Chemical and Physical Processes in Molecular Systems, Editor: M. Chergui (World Scientific, Singapore, 1996) p. 491.

- Ultrafast electron dynamics at Cu(111): Response of an electron gas to optical excitation
T. Hertel, E. Knoesel, M. Wolf, G. Ertl; Phys. Rev. Lett. 76(3) 535-538 (1996).

- Femtosecond dynamics of electronic excitations of adsorbates studied by 2-photon photoemission pulse correlation – CO/Cu(111)
E. Knoesel, T. Hertel, M. Wolf, G. Ertl; Chem. Phys. Lett. 240(5-6) 409-416 (1995).

- Electronic excitations of adsorbates analyzed with 2-photon photoemission - CO/Cu(111)
T. Hertel, E. Knoesel, M. Wolf, G. Ertl; Nucl. Instrum. Meth. B 101(1-2) 53-55 (1995).

- Unoccupied adsorbate states of CO/Cu(111) analyzed with 2-photon photoemission
T. Hertel, E. Knoesel, E. Hasselbrink, M. Wolf, G. Ertl, Surf. Sci. 317(3) L1147-L1151 (1994).

- Reactivity of carbon cluster ions with Ar, O2 and D(2)
W. Weckwerth, E. Knoesel, A. Ding, Z. Phys. D Atom. Mol. CL 26 S305-S307 Suppl. (1993).

---

back to home page