Terahertz – and Ultrafast Spectroscopy Laboratory

Professor Ingrid Wilke

Associate Professor of Physics

Rensselaer Polytechnic Institute

Department of Physics, Applied Physics and Astronomy

Jonsson Rowland Science Center (1 C20)

110 8th Street

Troy, NY 12180-3590 (USA)

phone: (518) 276 6318, fax: (518) 276 6680, email: wilkei@rpi.edu

Office hours Spring 2008: Tuesday 3pm-4pm and 5pm-6pm

Research group meeting: TBA Science Center 1 C20

- Curriculum Vitae Research Projects Research Group –

- Research in the News -

- Teaching Service Publications Announcements Links

Research in the News back to top

News release Rensselaer Polytechnic Institute: Nano Technique Allows Precise Injection of Living Cells (June 2007)

Biophotonics International: Femtosecond near-infrared pulses used for microinjection (p.24, July 2005)

Nature news and views in brief : A new source of terahertz radiation? (Nature vol. 429, p. 519, 3 June 2004)

Optics in 2002: Time-domain terahertz science improves relativistic electron-beam diagnostics

(OSA Optics & Photonics News, vol. 13, p. 16, December 2002)

Welt am Sonntag : Unternehmen schätzen die Logik der Physiker (Welt am Sonntag, 20 January 2002)

Offenbach Post : Offenbach vor 25 Jahren (Offenbach Post, Fruehjahr 2004)

Curriculum Vitae

Since 2008 Associate Professor of Physics, Rensselaer Polytechnic Institute, Troy NY (USA).

2002-2008 Assistant Professor of Physics, Rensselaer Polytechnic Institute, Troy NY (USA).

2002 Habilitation in Experimental Physics, University of Hamburg.

2001 Certificate in Higher Education, University of Hamburg.

1995-2002 Senior Research Associate (C1) at the Universitaet Hamburg (Germany), Institute of Applied Physics.

1994-1995 Post-Doc at the University of Tokyo (Japan), Institute of Industrial Science.

1993-1994 Post-Doc at the Lawrence Berkeley National Laboratory, Berkeley CA (USA).

1993 Doctoral Degree in Physics, Swiss Federal Institute of Technology (ETH) Zuerich.

1988-1992 Researcher at the Swiss Federal Institute of Technology (ETH) Zuerich (Switzerland),

Institute of Quantum Electronics.

1988 Diplom in Physics, Universitaet Wuerzburg (Germany).

1986 M. Sc. in Physics, State University of New York (SUNY) at Albany, USA.

1981 Abitur, Rudolf-Koch-Schule in Offenbach am Main.

Research back to top

Time-domain Terahertz (THz) spectroscopy & Ultrafast spectroscopy

• THz-emission spectroscopy from narrow band gap semiconductors
• Time-domain THz-transmission / reflection spectroscopy of dielectrics and thin films
• Applications of time-domain THz-methods in accelerator physics
• Biological applications of ultrashort laser pulses

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

More on my research

Research participation is available for interested undergraduate and graduate students.

Research Group back to top

Graduate Students

Eric Hofmann

Suranjana Sengupta

Undergraduate Students

Former Graduate Students and Thesis Topics:

Cheng Peng, PhD (Rensselaer Polytechnic Institute 2006)

Opto-injection into single living cells by femtosecond near-infrared laser

Present employment: Medical College of Wisconsin, Department of Radiation Oncology, Milwaukee, WI.

Ricardo Ascazubi, PhD (Rensselaer Polytechnic Institute 2005)

THz Emission Spectroscopy of Narrow Bandgap Semiconductors

Present Employment: Intel Corporation

Dr. Maxim Khazan (University of Hamburg, Germany 2002)

Time-domain Terahertz Spectroscopy and its Application to the Study of High-Tc Superconductor Thin Films

Present employment: ABB, Prague, Czech Republic

Dr. Tobias Korn (Diplomarbeit, University of Hamburg, Germany 2001)

Femtosecond Spectroscopy of LT-GaAs and Microcavities

Present employment: University of Regensburg, Germany.

Dipl. Phys. Hanns Selig (Diplomarbeit, University of Hamburg, Germany 2001)

Electro-optic sampling of Terahertz-Pulses

Present employment: Center of Applied Space Technology and Gravity, Bremen, Germany.

Dipl. Phys. Antonia Franke Wiekhorst (University of Hamburg, Germany)

Present employment: Founder and CEO of Physik im Kindergarten

Wenzhou Chen M.Sc. Physics (Rensselaer Polytechnic Institute 2004)

Dan Rainville M.Sc. Physics (Rensselaer Polytechnic Institute 2005)

Lauren O’Malley M.Sc. Physics (Rensselaer Polytechnic Institute 2005)

Jianhui Tian M. Sc. Physics (Rensselaer Polytechnic Institute 2006)

Former Undergraduate Research Assistants:

Matthew Mitos-Jacobs B. Sc. Applied Physics & Electrical Engineering (Rensselaer Polytechnic Institute 2004)

Present: UC Santa Barbara, Department of Electrical Engineering

Kyle Deniston (SUNY Geneseo), Research Experience for Undergraduates (REU) summer 2003

Carl Shneider B. Sc. Physics & Mathematics, M.Sc. Applied Mathematics (Rensselaer Polytechnic Institute 2006), Undergraduate research program (URP) summer 2004

Present: University of Utrecht (Netherlands), Department of Physics

Courtney Krest, St. John’s Fisher College, Research Experience for Undergraduates (REU) summer 2005

Erin McElmurray, B. Sc.. Biomedical Enginereering, (Rensselaer Polytechnic Institute 2007), Undergraduate research program (URP) summer 2006

Carl Siemon B. Sc. Physics (Rensselaer Polytechnic Institute 2007)

Present: University of Texas, Austin, Department of Physics

Joshua Sarver B. Sc. Physics , B. Sc.Psychology (Rensselaer Polytechnic Institute 2007)

Carolyn Gosztyla B. Sc. Biophysics / Biochemistry (Rensselaer Polytechnic Institute 2008)

Service back to top

• Measurements of the optical constants of bulk dielectrics and dielectric thin films between 0.1-3THz
• Characterization of Terahertz-emission from solids (bulk and thin films)

Teaching Spring 2008 back to top

PHYSICS 1200 Monday & Thursday noon-2pm and 2pm-4pm Office hours Spring 2008: Tuesday 3pm-4pm and 5pm-6pm

PHYSICS COLLOQUIUM Wednesday 4pm

Selected Puplications ) back to top

Y. Ko, S. Sengupta, S. Tomasulo, P. Dutta, Ingrid Wilke

Emission of terahertz-frequency electromagnetic radiation from bulk Ga_xIn_1-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, Partha Dutta

Terahertz emission from Ga _1-x In _x 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).

Ingrid Wilke, A. M. MacLeod, W. A. Gillespie, G. Berden, G. M. H. Knippels, A. F. G. van der Meer
Single-shot electron-beam bunch length measurements
Physical  Review. Letters 88, 124801 (2002) pdf

Ingrid Wilke, T. Korn, U. Pape, F. Hollweg, Praktikumsversuch: Erzeugung und Messung von Magnetfeldern [English: Introductory laboratory experiment: Generation and measurements of magnetic fields], Verhandl. DPG (VI) 37, 4/ 53 (2002). (poster pdf)

T. Korn, A. Jaye, S. Schnüll, Ingrid Wilke
Characterization of nanometer As-clusters in low-temperature grown GaAs by transient reflectivity measurements
Journal of. Applied. Physics 91, 2333 (2002) pdf

M. Khazan, R. Meissner, Ingrid Wilke
Convertible transmission-reflection time-domain terahertz spectrometer
Review of  Scientific Instruments 72, 3427 (2001) pdf

H. Nemec, A. Pashkin, P. Kuzel, M. Khazan, S. Schnüll, Ingrid Wilke
Carrier dynamics in low-temperature grown GaAs studied by THz emission spectroscopy
Journal of Applied Physics 90, 1303 (2001) pdf

M. Khazan, Ingrid Wilke, C. Stevens
Surface impedance of Tl-2212 thin films at THz-frequencies
IEEE Transactions on Applied Superconductivity vol.11, pt.III, 3537 (2001) pdf

Ingrid Wilke, M.Khazan, C.T.Rieck, T.Kaiser, P.Kuzel, C.Jaekel, H.Kurz
Terahertz surface resistance of high temperature superconducting thin films
Journal of Applied Physics 87, 2984 (2000) pdf

C.Nowak, Ingrid Wilke, U.Wollmer (Hg.)
Kiss The Future ! Physikerinnen stellen sich vor, Tagungsband der Deutschen  Physikerinnentagung 1998
Verlag Hoffmann und Hoyer 1999

Ingrid Wilke
T-Strahlen - oder kohärente Terahertzspektroskopie mit photoleitenden Dünnfilmantennen
in Phasensprung - Physikerinnen stellen sich vor, Hrg. S.Petrak, B.Sandow,
Wissenschaftlerinnen-Forum Band 5, 74, Verlag Hoffmann & Hoyer 1998

S.D.Ganichev, E.Ziemann, Th.Gleim, W.Prettl, I.N.Yassievich,V.I.Perel, Ingrid Wilke, E.E.Haller
Carrier tunneling in high-frequency electric fields
Physical Review Letters, 80 (11), 2409 (1998) pdf

K.Hirakawa, Ingrid Wilke, K.Yamanaka, H.G.Roskos, M.Vossebürger, F.Wolter,C.Waschke, H.Kurz, M.Grayson, D.C.Tsui
Coherent submillimeter-wave emission from non-equilibrium two-dimensional free carrier plasmas in AlGaAs/GaAs heterojunctions
Surface Science 361/362, 368 (1996)

M.Vossebürger, H.G.Roskos, F.Wolter, C.Waschke, H.Kurz, K.Hirakawa, 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) pdf

O.D.Dubon, Ingrid Wilke, J.W.Beeman, E.E.Haller
Dependence of the hole lifetime on uniaxial stress in Ga-doped Ge
Physical Review B51, 7349 (1995) pdf

Ingrid Wilke, O.D.Dubon, J.W.Beeman, E.E.Haller
Spectroscopy of the hole population in bound excited acceptor states during recombination in p-type Ge
Solid State Communications 93, 4309 (1995).

Ingrid Wilke, Y.Oppliger, W.Herrmann, F.K.Kneubuehl
Nanometer thin-film Ni-NiO-Ni diodes for 30THz radiation
Applied Physics A 58, 329 (1994)

Ingrid Wilke, W.Herrmann, F.K.Kneubuehl
Integrated nanostrip dipole antennas for coherent 30THz infrared radiation
Applied Physics. B 58, 87 (1994)

H.C. Petzold, R.Putzar, U.Weigmann, Ingrid Wilke
Repair of clear x-ray mask defects by laser-induced metal deposition
Microelectronic Engineering 6, 623 (1987)

Announcements back to top

Reseach in the News back to top

Biophotonics International: Femtosecond near-infrared pulses used for microinjection (p.24 July 2005)

Nature news and views in brief : A new source of terahertz radiation? (Nature vol. 429, p. 519, 3 June 2004)

Optics in 2002: Time-domain terahertz science improves relativistic electron-beam diagnostics

(OSA Optics & Photonics News, vol. 13, p. 16, December 2002)

Welt am Sonntag : Unternehmen schätzen die Logik der Physiker (Welt am Sonntag, 20 January 2002)

Offenbach Post : Offenbach vor 25 Jahren (Offenbach Post, Fruehjahr 2004)

Links back to top

New York Times

Madam & Eve

Albany Rowing Center

Rensselaer Polytechnic Institute Crew Club

New Rowing Information in the US and worldwide

Cross-country skiing in NY state

Deutsche Physikerinnentagung 2008

last modified 3 July 2008 wilkei@rpi.edu

Homepage Rensselaer Polytechnic Institute, Department of Physics, Applied Physics & Astronomy