Professor Heritage's Group
Although recently retired, Professor Heritage is still
extremely active as a Research Professor and Professor Emeritus. His group is conducting research in
microphotonics, terahertz bandwidth optics, next generation optical networks,
optical-microwave interactions, and vacuum optoelectronics.
improvement of vacuum photocathodes based on optical gating of arrays of
fabricated silicon field emitter tips.
mirror arrays for all-optical switching, femtosecond pulse shaping, and
miniature broadband time delay scanners.
of the impact of physical layer impairments on performance of switched
joint UC Davis / SLAC / LLNL project aiming to develop a compact high
brightness X-ray source for medical applications and for fundamental
studies of ultrafast dynamics of bulk state of matter.
X. Liu, C.-J. Chang, and J. P. Heritage, “Gated response of p-Silicon field emitter array and
correlation with theoretical modes,” J. of Appl. Phys. 99,
H. Yurong, J. P. Heritage, and B. Mukherjee,
"Connection provisioning with transmission impairment consideration in
optical WDM networks with high-speed channels," J. Lightwave Tech., 23,
pp. 982-93, 2005.
R. P. Scott, W. Cong, C. Yang, V. J. Hernandez, J. P.
Heritage, B. H. Kolner, and S. J. Ben Yoo, “Error free, 12 user, 10
Gb/s/user O-CDMA network testbed without FEC,” IEE Elect. Lett. 41,
P. Scott, W. Cong, V. J. Hernandez, K. Li, B. H. Kolner, J. P. Heritage, and
S. J. B. Yoo, "An Eight-User, Time-Slotted SPECTS O-CDMA Testbed:
Demonstration and Simulation," J. of Lightwave Tech., 23, 2005.
Yurong, W. Wushao, J. P. Heritage, and B. Mukherjee, "A generalized
protection framework using a new link-State availability model for reliable
optical networks," J. Lightwave Tech., 22, pp. 2536-47, 2004.
O. Solgaard, J. P. Heritage, Amal Bhattarai,
“Multi-Wavelength Cross-Connect Optical Switch,” 6,097,859, Aug,
2000. Continuations awarded: 6,289,145; 6,327,398; 6,374,008; 6,389,190;
6,711,320; 6,819,823; 6,834,136; 6,922,239.
P. Heritage and A. M. Weiner, “Shaping Optical Pulses by Amplitude and
Phase Masking,” 4,655,547, Apr.
P. Heritage, and A. M. Weiner, “Apparatus for stabilization of High
Speed Optical Pulses,” 4,746,193, May, 1988.
A. Brackett, J. P. Heritage, J. A. Salehi, and A. M. Weiner, “Optical
Telecommunications System Using Code Division Multiple Access,”
4,866,699, Sept. 1989.
P. Heritage and A. M. Weiner, “Optical Systems and Methods Based Upon
Temporal Stretching, Modulation and Recompression of Ultrashort
Pulses,” 4,928,316, May 1990.
Professor Knoesen's Group
This group performs research in methods, materials, and
devices for high-frequency electronic and optoelectronic applications.
Recent projects include:
optical imaging of collagen using polarization-modulated second
harmonic, and studies of the second harmonic and two-photon fluorescence
spectra of collagen.
of a new finite-difference method in the frequency domain for simulation
of waveguiding structures of arbitrary cross-section including extremely
of a new technique of measuring the permittivity in microwave regime of
liquid and biomolecules at interfaces. By studying the dielectric
behavior over a wide frequency range up to 40 GHz, target biomolecules
can be sensed in real time without fluorescence tags.
and characterization of silicon oxynitride based waveguiding
structures. The index of refraction of such structures can be
chosen to optimize interactions with external media, such as liquids or
optical absorption measurements of low-absorption polymers using
photothermal deflection spectroscopy (PDS).
Prof. Knoesen is also affiliated with the Center on Polymer
Interfaces and Macromolecular Assemblies (CPIMA), an NSF sponsored
partnership among Stanford University, IBM Almaden Research Center, and the
University of California Davis.
C. M. Arft and
A. Knoesen, “An efficient finite-difference frequency-domain method for
waveguiding structures including thin curved layers,” Microwave Opt. Tech. Lett., 48, 453-457, 2006.
C. M. Arft and
A. Knoesen, “Alternatives to the perfectly matched layer for waveguide
simulation using the FDFD method,” Electromagnetics,
25, 117-186, 2005.
A. Knoesen, S.
Pakalnis, M. Wang, W. D. Wise, N. Lee, and C. W. Frank, “Sum-frequency
Spectroscopy and Imaging of Aligned Helical Polypeptides,” J. Sel. Topics Quant. Electron., 10, 1154-1162, 2004.
C. M. Arft and
A. Knoesen, “An Efficient Finite Difference Frequency Domain Method
Including Thin Layers,” Microwave
Opt. Tech. Lett., 43,
A. Knoesen, G.
Song, W. Volksen, E. Huang, T. Magbitang, L. Sundberg, J. L. Hedrick, C. J.
Hawker, and R. D. Miller, “Porous organosilicates low-dielectric films
for high-frequency devices,” J.
Electron. Mat., 33, 135-140,
Professor Yoo’s Group
Professor Yoo is the principal
investigator of the Optical Switching and Communication Systems Laboratory at
UC Davis. This group performs research
toward the next generation of optical networking technologies. Specific areas of research include photonic
switching and routing, optical CDMA, and next generation architecture and
For more information refer to the
Optical Switching and Communication Systems Laboratory Web Page.