Faculty & Staff Kevin P. Chen

Associate Professor, Department of Electrical and Computer Engineering and Paul E. Lego Faculty Fellow

412-624-9675
Fax: 412-624-8003
Office: BENDM 442

Education

Ph.D. (Electrical Engineering), University of Toronto, 2002

Courses

ECE 1259 Electromagnetics I

ECE 1266 Applications of Fields and Waves

ECE 1232 Introduction to Lasers and Optical Electronics

ECE 2231 Fundamentals of Semiconductor and Quantum Electronic Devices

Labs

Research

Dr. Chen and his students engage in wide spectra of interdisciplinary research. We explore both technology frontiers and develop engineering solutions for sustainability, energy, bio-medical, homeland security, and etc. The group's expertise include fiber optics, UV and ultrafast laser processing, microfabrication, finite element analysis, nuclear micro-engineering especially in tritium, and minaturized photonic system integration. Our group is well-equipped, resourceful, friendly, and open for collaboration. Members of the group come from different backgrounds and are self-motivated. We do not self-impose boundary. As a principal investigators, our research efforts have been supported by a number of funding agencies including DARPA, TTC, NSF, DoE, NASA, and private industries. Dr. Chen is a recipient of National Science Foundation CAREER Award.

Research News

Cover story of Applied Physics Letters on the inprinting of 3D photonic crystal using 2D phase masks (July, 2008)
Cover story of Applied Physics Letters on holographic fabrication of photonic crystal structure (Dec. 17, 2007)
Cover story of Applied Optics on five-beam holographic fabrication of 3-D photonic structures, Nov. 1st, 2006
Research news: “Silicon goes nuclear,” Nature Physics, vol. 2, pp. 296 (2006)
Feature story at www.optics.org on nuclear micro-engineering in April 2006
Newsbreaks: “ Excimer-laser light locks tritium into silica for micropower”, Laser Focus World, June 2006.
Cover story of Applied Physics Letters on active fiber Bragg grating sensors (Dec. 7, 2005)
Newsbreaks: “157-nm laser write grating fast”, Laser Focus World, February 2001.

Selected Publications

(* Student, †Corresponding author)

H. An†, S. Fleming, B. McMillen, K. P. Chen, and D. Snokes, “Thermal poling induced second-order nonlinearity in femtosecond laser modified fused silica”, submitted to Appl. Phys. Lett.
B. McMillen*, K. P. Chen†, H. An, S. Fleming, R. B. Balili, and D. Snoke, “Waveguiding and electro-optic chracteristics of three-dimensional waeguides in LiTaO3 written by high-repetition rate ultrafast laser”, submitted to Appl. Phys. Lett.
B. Liu*, K. P. Chen†, N. P. Kherani, S. Zukotynski, and L. Gadeken, “Power-scaling performance of three-dimensional tritium betavoltaic diode”, submitted to Appl. Phys. Lett.
M. Buric*, J. Falk†, K. P. Chen, and S. Woodruff, “Enhanced spontaneous Raman scattering and gas composition analysis using a photonic crystal fiber”, Accepted by Appl. Opt.
B. Liu*, N. P. Kherani, K. P. Chen†, and S. Zukotynski, "Tritiation of semiconductor materials for micropower application," Fusion Science and Technology Volume 54, pp. 627-30, 2008
B. Liu*, D. Alvarez-Ossa, N. P. kherani†, S. Zukotynski, and K. P. Chen, "Smoke and particle detector using tritiated semiconductor foil," Fusion Science and Technology, 2008 Volume 54, pp. 631-634, 2008
A. B. Antoniazzi†, C. S. Morton, K. P. Chen, and B. Liu*, "High-pressure and high-termperature tritium apparatus for the exposure of semiconductor wafers," Fusion Science and Technology Volume 54, pp. 635-38, 2008
D Xu*, K. P. Chen†, I. Olvera, K. Ohlinger, and Y. Lin, “Holographic fabrication of diamond-like photonic crystal template using two-dimensional diffractive optical elements”, Appl. Phys. Lett. Vol. 93, pp.261193, 2008
Y. Lin, A. Harb, D. Rodriguez, K. Lozano, D. Xu*, and K. P. Chen, “Fabrication of two-layer integrated phase mask for single-beam and single-exposure fabrication of three-dimensional photonic crystal”, Opt. Exp. Vol. 16, pp. 9165-9172, 2008
N. Kherani, B. Liu*K. Virk, T. Kosteski, F. Gaspari, W. T. Shmayda, S. Zukotynski, and K. P. Chen,“Hydrogen effusion from tritiated amorphous silicon”, J. of Appl. Phys., vol. 103, pp. 024906, 2008
B. Liu*, K. P. Chen†, N. Kherani, S. Zukotynski, and A. B. Antoniazzi, “Contact potential difference betavoltaic using scandium trititde”, Appl. Phys. Lett., vol. 92, pp. 083511, 2008
Z. Poole*, D Xu*, K. P. Chen†, I. Olvera, K. Ohlinger, and Y. Lin, “Holographic Fabrication of Three-Dimensional Orthorhombic and Tetragonal Photonic Crystal Templates Using a Diffractive Optical Element”, Appl. Phys. Lett., vol. 91, 251101 (2007)
B. Liu*, D. Alvarez-Ossa, N. P. Kherani†, S. Zukotynski, and K. P. Chen, “Gamma-free smoke and particle detector using tiritiated foils”, IEEE Sensor Journal, vol. 7, pp. 917-8, 2007
M. Buric*, M. Bhattarai*, P. Swinehart, M. Mokhar*, and K. P. Chen†, "Active Fiber Bragg Grating Hydrogen Sesnor for All-Temperatuer Operation", IEEE Photon. Technol. Lett. vol. 19, pp. 255-257, 2007
Y. Lin†, D. Rivera, Z. Poole*, and K. P. Chen, “Five-beam interference pattern controlled through phases and wavevectors for diamond-like photonic crystals”, Appl. Opt., vol. 35, pp. 7971-7976, 2006
B. J. Liu*, K. P. Chen†, N. P. Kherani, T. Kosteski, S. Costea, S. Zukotynski, and A. B. Antoniazzi, “Tritiation of amorphous and crystalline silicon using tritium gas”, Appl. Phys. Lett., vol. 80, pp. 044104, 2006
C. Jewart*, K. P. Chen†, B. McMillen*, M. Bails, S. P. Levitan, J. Canning, and I. V. Avdeev, " Sensitivity Enhancement of fiber Bragg gratings to transverse stress using microstructure fibers ", Opt. Lett., vol. 31, pp. 2260-2262, 2006
M. Buric*, J. Falk, K. P. Chen†, L. Cashdollar*, A. Elyamani, " Piezo-Electric Tunable Fiber Bragg Grating Diode Laser for Chemical Sensing Using Wavelength Modulation Spectroscopy", Opt. Exp., vol. 14, pp. 2178-2183, 2006
B. J. Liu*, K. P. Chen†, N. P. Kherani, S. Zukotynski, and A. B. Antoniazzi, "Tritium locked in silica using 248-nm KrF laser irradiation", Appl. Phys. Lett., vol. 88, pp. 134101, 2006
C. Jewart*, B. McMillen*, S. K. Cho, and K. P. Chen†, “X-Probe flow sensor implemented through the use of active fiber-Bragg gratings”, Sensor and Actuator A, vol. 127, pp. 63-68, 2006
Q. Chen†, K. P. Chen, W. Xu, and S. Nikumb, “Deep ultraviolet femtosecond laser tuning of fiber Bragg gratings”, Opt. Comm., vol. 259, pp. 123-126, 2006
Y. Lin† and K. P. Chen, " Woodpile-type photonic crystals with orthorhombic or tetragonal symmetry formed through phase mask techniques", Opt. Exp., vol. 14, pp. 887-892, 2006
B. McMillen*, C. Jewart*, M. Buric*, W. Xu, Y. Lin, and K. P. Chen†, (Cover Story) "Fiber Bragg grating vacuum sensor” Appl. Phys. Lett., vol.87, pp. 234101, 2005
L. Cashdollar*, and K. P. Chen†, “Active Fiber Optical Flow sensor” IEEE Sensors Journal, Vol. 5, no. 6, pp. 1327-1331, 2005.
K. P. Chen†, B. McMillan*, and L. Cashdollar* “Self-heated fiber Bragg grating sensors”, Appl. Phys. Lett., Vol. 86, no. 14, pp. 143503(1)-(3), 2005.
K. P. Chen†, “Active Fiber Optical Components Powered by In-fiber Light”, (Invited feature article), Photonics Spectra, April issue, pp. 78-90, 2005
K. P. Chen†, L. Cashdollar, and W. Xu, “Controlling Fiber Bragg Grating Spectra with in-Fiber Diode Laser Light” IEEE Photon. Technol. Lett. Vol. 16, 1897-1899, (2004)
Q. Y. Chen, K. P. Chen†, M. Buric, and S. Nikumb, “Trimming phase and birefringence errors with deep ultraviolet femtosecond laser in planar lightwave circuits”, IEE Electron. Lett. Vol. 40, 1179-1180, (2004)
K. P. Chen† and P. R. Herman, “Photosensitization of standard fibers with deep UV laser radiation” IEEE/OSA J. of lightwave Technol. Vol. 21, 1958-1968, (2003)
K. P. Chen† Peter R. Herman, and Rod Taylor “VUV laser-induced refractive index change and birefringence in standard fiber”, IEEE/OSA J. of lighwave Technol. Vol. 21, 1969-1977, (2003)
K. P. Chen†, P. R. Herman, and R. Taylor, “Photosensitivity and Application with 157-nm F2 Laser Radiation in Planar Lightwave Circuits” IEEE/OSA J. of lighwave Technol. Vol. 21, 140-148, (2003)
K. P. Chen† and P. R. Herman, “Trimming phase and birefringence errors in photosensitivity-locked planar optical circuits”, IEEE Photon. Tech. Lett. Vol. 14, 71-73 (2002)
K. P. Chen†, P. R. Herman, and R. Tam, “Strong fiber Bragg gratings fabrication by hybrid 157-nm and 248-nm laser exposure”, IEEE Photon. Technol. Lett. Vol. 14, 170-172 (2002)
K. P. Chen†, and P. R. Herman, “Phase error correction in planar lightwave circuit interleaver using photosensitization technique” IEE Electron. Lett. Vol. 38, 24-26 (2002)
K. P. Chen†, X. L. Wei, and P. R. Herman, “Strong 157-nm F2-laser photosensitivity-locking of hydrogen-loaded telecommunication fiber for 248-nm fabrication of long-period grating IEE Electron. Lett. Vol. 38, 17-19 (2002)

K. P. Chen† and P. R. Herman, “Enhancement and tuning of fiber Bragg grating reflection by 157-nm F2 laser post exposure”, IEE Electron. Lett. Vol. 37, 822-3 (2001)
K. P. Chen†, P. R. Herman, J. Zhang, and R. Tam, “Fabrication of strong long-period gratings in hydrogen-free fibers with 157-nm F 2 -laser radiation”, Opt. Lett., Vol. 26, 771-773 (2001 )
K. P. Chen†, P. R. Herman, R. Tam, J. Zhang, “Rapid long-period grating formation in hydrogen-loaded fibre with 157 nm F2-laser radiation”, IEE Electron. Lett. vol.36, 2000-1,(2000)
M. Lapczyna†, K.P. Chen, P.R. Herman, H.W. Tan, R.S. Marjoribanks, "Ultra-high repetition rate (133 MHz) laser ablation of aluminum with 1.2-ps pulses", Appl. Phys. A. 69 S883-S886 (1999)
P.R. Herman†, K.P. Chen, P. Corkum, A. Naumov, S. Ng, J. Zhang, "Advanced lasers for photonic device microfabrication", RIKEN Review 32, 31-35 Jan. (2001).
P.R. Herman†, R.S. Marjoribanks, A. Oettl, K. P. Chen, "Laser shaping of photonic materials: deep ultraviolet and ultrafast lasers", Appl. Surf. Sci. 154-155, 577-586 (2000)