Ingrid Wilke
Associate Professor of Physics

M. S., Physics, State University of New York (SUNY) at Albany, 1986
Diplom, Physics, University of Wuerzburg, Germany, 1988
Ph.D., Physics,ETH, Zuerich, Switzerland, 1993
M. S. Higher Education, University of Hamburg, Germany, 2001
Habilitation, Experimental Physics, University of Hamburg, 2002

Career Highlights:
Ingrid Wilke joined RPI as an assistant professor of physics in 2002. Prior to her appointment at RPI, she spent seven years as a senior research associate (C1) at the University of Hamburg's (Germany) Institute of Applied Physics. She has done post-doctoral work at both the University of Tokyo's Institute of Industrial Science and at the Lawrence Berkley National Laboratory, Materials and Chemical Science division.

Research Areas:

  • Time-domain Terahertz (THz) spectroscopy
  • Ultrafast spectroscopy
  • Applications of femtosecond laser pulses in biology and medicine

Time-domain Spectroscopy and Ultrafast Spectroscopy
Ingrid Wilke’s research is focused on the development of narrow band gap semiconductors as sources of THz-radiation for time-domain THz-spectroscopy and imaging systems. Another area of research is the measurement of the dielectric function of materials in the THz-frequency range using time-domain THz spectroscopy. Materials of interest are glasses, ceramics, semiconductors, superconductors and biological tissue.

Experimental Methods:
Time-domain THz-emission measurements, time-domain THz transmission and reflection spectroscopy, phase-sensitive backward wave oscillator based THz-spectroscopy, femtosecond optical transient reflectivity and transmittivity measurements, femtosecond optical four-wave mixing, femtosecond laser nanoprocessing of living cells and fluorescence microscopy.

Selected Publications:

Ingrid Wilke, R. Ascazubi, H. Lu, W. J. Schaff, "Terahertz emission from
silicon and magnesium doped indium nitride" Applied Physics Letters 93,
221113 (2008).

Ingrid Wilke, "Terahertz Spectroscopy" in "Encyclopedia of Analytical
Chemistry", edited by R. A. Meyers, John Wiley & Sons, Ltd. (2008).

Y. Ko, S. Sengupta, S. Tomasulo, P. Dutta, Ingrid Wilke, “Emission of terahertz-frequency electromagnetic radiation from bulk GaxIn1-xAs crystals” Physical Review B 78, 035201 (2008).

Ingrid Wilke, S. Sengupta, “Nonlinear Optical Techniques for Terahertz Pulse Generation and Detection – Optical Rectification and Electrooptic Sampling” in Terahertz Spectroscopy: Principles and Applications, edited by S. L. Dexheimer, Optical Science and Engineering vol. 131, 41, CRC Press (2007).

C. Peng, R. E. Palazzo, Ingrid Wilke, “Laser intensity dependence of femtosecond near-infrared optoinjection”, Physical Review E 75, 041903 (2007)

R. Ascazubi, Ingrid Wilke, K. J. Kim, P. Dutta, “Terahertz emission from GaIn Sb”, Physical Review B 74, 075323 (2006).

R. Ascazubi, Ingrid Wilke, S. Cho, H. Lu, W. Schaff, “Ultrafast recombination in Si-doped InN”, Applied Physics Letters 88, 112111 (2006).

R. Ascazubi, C. Shneider, Ingrid Wilke, R. Pino, P. Dutta, “Enhanced terahertz emission from impurity-compensated GaSb”, Physical Review B, 72, 045328 15. (2005).

R. Ascazubi, Ingrid Wilke, K. Denniston, H. Lu, W. Schaff, “Terahertz emission by InN”, Applied Physics Letters, 84, 4810 (2004)

G. Berden, W. A. Gillespie, G. M. H. Knippels, A. M. MacLeod, A. F. G. van der Meer, Ingrid Wilke, "Single-shot Electron-beam Bunch Length Measurements," Physical Review. Letters 88, 124801 (2002).

M. Khazan, R. Meissner, Ingrid Wilke, "Convertible Transmission-reflection Time-domain Terahertz Spectrometer," Review of Scientific Instruments 72, 3427 (2001).

M. Khazan, P. Kuzel, H. Nemec, A. Pashkin, S. Schnüll, Ingrid Wilke, "Carrier Dynamics in Low-temperature Grown GaAs Studied by THz Emission Spectroscopy," Journal of Applied Physics 90, 1303 (2001).

M. Khazan, C. Stevens, Ingrid Wilke, "Surface Impedance of Tl-2212 Thin Films at THz-frequencies," IEEE Transactions on Applied Superconductivity, Vol. 11, pt. III, 3537 (2001).

T. Kaiser, C. Jaekel, M. Khazan, H. Kurz, P. Kuzel, C. T. Rieck, Ingrid Wilke, "Terahertz Surface Resistance of High Temperature Superconducting Thin Films," Journal of Applied Physics 87, 2984 (2000).

S. D. Ganichev, Th. Gleim, E. E. Haller, V. I. Perel, W. Prettl, Ingrid Wilke, I. N. Yassievich, E. Ziemann‚ "Carrier Tunneling in High-frequency Electric Fields," Physical Review Letters, 80 (11), 2409 (1998).

K. Hirakawa, H. Kurz, H. G. Roskos, M. Vossebürger, C. Waschke, F. Wolter, Ingrid Wilke, K. Yamanaka, "Radiative Decay of Optically Excited Coherent Plasmons in a Two-dimensional Electron Gas," Journal of the Optical Society of America A 13, 1045 (1996).

J. W. Beeman, O. D. Dubon, E. E. Haller, Ingrid Wilke, "Dependence of the Hole Lifetime on Uniaxial Stress in Ga-doped Ge," Physical Review B51, 7349 (1995).

J. W. Beeman, O. D. Dubon, E. E. Haller, Ingrid Wilke, "Spectroscopy of the Hole Population in Bound Excited Acceptor States During Recombination in P-type Ge," Solid State Communications 93, 4309 (1995).

W. Herrmann, F. K. Kneubuehl, Y. Oppliger, Ingrid Wilke, "Nanometer Thin-film Ni-NiO-Ni Diodes for 30THz Radiation," Applied Physics A 58, 329 (1994).

W. Herrmann, F. K. Kneubuehl, Ingrid Wilke, "Integrated Nanostrip Dipole Antennas for Coherent 30THz Infrared Radiation," Applied Physics B 58, 87 (1994).

Contact Information:
Dr. Ingrid Wilke
Rensselaer Polytechnic Institute
Department of Physics, Applied Physics & Astrnomy
110 8th Street
Troy, NY 12180-3590 USA

Phone: (518) 276-6318
Personal Web Page: