Xi-Cheng Zhang
J. Erik Jonsson '22 Professor of Science
Professor, Physics, Applied Physics, and Astronomy
Professor, Electrical, Computer & System Engineering

B.S., Physics, Peking University, Beijing, China, 1982
M.S., Physics, Brown University, 1983
Ph.D., Physics, Brown University, 1986

Career Highlights:
Dr. Zhang has received 20 US patents, 7 international patents and numerous awards including the National Science Foundation's CAREER award, Rensselaer Early Career Award, Research Corporation's Cottrell Award, and China's Outstanding Scholar Award. He is a Fellow of IEEE, the Optical Society of America, the American Physics Society, and World Innovation Foundation. He joined RPI in 1992 and has held faculty positions at Xiamen University, Institute of Physics, Institute of Fine Machines and Optics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science, Capital Normal University of Beijing, and the Shanghai University.

Research Areas:

  • Terahertz Optics Sensing
  • Terahertz Optics Imaging

Terahertz Optics Sensing
Zhang's work with time-domain THz spectroscopy systems holds promise for diagnostics of materials such as semiconductors and biomolecules. THz time-domain spectroscopy uses short pulses of broadband THz radiation, typically generated using ultrafast laser pulses. The transmitted THz electric field is measured coherently, which provides both high sensitivity and time-resolved phase information.

Terahertz Optics Imaging
Zhang's interest in THz wave imaging is a result of the availability of phase-sensitive spectroscopic images. These images, called "functional images," are ideal for dry dielectric substances including paper, plastics, and ceramics. Zhang's research centers on two-dimensional THz wave imaging through free-space electro-optic detection and on THz ray, or T-ray, imaging for probing the dielectric properties of three-dimensional structures.

Recent Publications

  1. “Coherent terahertz echo of tunnel ionization in gases,” Nicholas Karpowicz and X.-C. Zhang, Physics Review Letters, 102, 093001 (2009).
  2. “Terahertz wave generation from gas plasma at standoff distances using a phase compensator with attosecond phase-control accuracy,” Jianming Dai and X.-C. Zhang, Applied Physics Letters, 94, 021117 (2009).
  3. “Two-dimensional acoustic phase imaging with millimeter wave radiation,” Albert Redo-Sanchez, Gurpreet Kaur, X.-C. Zhang, Federico Buersgens, and Roland Kersting, IEEE Transactions on Microwave Theory and Techniques, 57, 589, (2009).
  4. “Coherent millimeter wave to mid-infrared measurements with continuous bandwidth reaching 40 THz,” N. Karpowicz, J. Chen, T. Tongue, and X.-C. Zhang, Electronics Letters 44, 544 (2008).
  5. “Tunable Broadband Anti-Reflection Structures for Silicon at Terahertz Frequency,” Y. W. Chen, P. Y. Han and X.-C. Zhang, Applied Physics Letters, 94, 041106 (2009)

For a complete list of publications please click here.

Contact Information:
Xi-Cheng Zhang
Professor, Department of Physics, Applied Physics and Astronomy
Professor, Department of Electrical, Computer and System Engineering
Erik Jonsson Chair Professor of Science
Rensselaer Polytechnic Institute,
110 8th Street
Troy, NY 12180-3590 USA

(518) 276-3079
Personal Web Page: http://www.rpi.edu/~zhangxc

Detailed CV