ROMAN SOBOLEWSKI
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Education
M.S., Department
of Electronics, Warsaw Technical University, Warsaw, Poland, 1975
Ph.D., Institute of Physics, Polish Academy of Sciences, Warsaw, Poland, 1983
Sc.D., Institute of Physics, Polish Academy of Sciences, Warsaw, Poland, 1992
Research
I conduct my
research at the UR Ultrafast
QuantumPhenomena Laboratory. My research interests are concentrated in the
areasof solid-state and quantum electronics. This is a truly interdisciplinary
effort, which overlaps such diverse disciplines as optics, micro- and
nanoelectronics, cryogenics, materials science, condensed matter physics, and
electrodynamics. My work is exploratory in nature, but it contains a strong
applied flavor. The best example is my quest for the development of new,
ultrafast devices based on integrated optical and solid-state technologies.
Specific research topics include:
·
physics of ultrafast
phenomena in condensed matter;
·
single-photon detection
for ultraweak luminescence sensing, deep-space optical communication, and
quantum computing and quantum cryptography;
·
ultrafast
optoelectronic photodetectors, transducers, and modulators;
·
ultrafast
superconducting digital electronics;
·
subpicosecond
electro-optic and magneto-optic characterization of high-performance
superconducting and semiconducting devices, circuits and transmission structures;
·
femtosecond
spectroscopy of high-temperature (high-Tc) superconducting films and the
development of ultrafast broadband high-Tc devices for electronic and
optoelectronic applications.
Lastest News
·
"Deep
Space Research Discovers Boon for Chip Makers," UR Press Release,
August 2001.
·
"Incubation for
frozen switch," Electronic Times, May 2001.
·
"Atlantic Signs Option
Agreement with The University Of Rochester for Superconducting Magneto-Optical
Modulator," Atlantic Ventures Technology Inc. Press Release, May 2001.
Professional
Activities
Author and
co-author of >200 publications, 3 technical patents, and >100 conference
presentations.
Participant in >70 scientific conferences (40 invited lectures).
Principal Investigator or Co-PI of >30 research grants (12 active).
Consultant-Lecturer for United Nations Industrial Development Organization,
1991.
Reviewer for the National Science Foundation, Civilian Research and Development
Foundation, U.S. Dept. of Energy, Air Force Office for Scientific Research,
International Science Foundation, Phys. Rev. Lett., Phys. Rev. B, IEEE Trans.
Electron Devices, IEE E Trans. Magnetics, and IEEE Trans. Appl. Supercon.,
Supercon. Sci. Tech.
Chair of the IEEE Electron Device Society Rochester Chapter, 1998.
Teaching
Undergraduate/graduate-level
courses taught at the Department of Electrical and Computer Engineering,
University of Rochester:
·
Physics of Solid-State
Devices (EE 420)
·
Solid State Electronics
(EE 223)
·
Electronic Devices and
Circuits (ECE 221)
·
Semiconducting Devices
(ECE 223/ECE 423/MSC 426)
·
Superconductivity and
Josephson Effect (ECE 425)
·
Electromagnetic Waves
(ECE230)
·
Special Topics in ECE
(ECE 396)
·
Senior Design Project
in ECE (ECE 349)
Supervision of Ph.
D. and M. S. graduate students, 1984 - present:
·
Ph. D.: W. Xiong
(1995), K. Green (1999) R. Adam (2001), C Williams (2001)
·
M. S.: A Schrock
(1992), R. Adam (1996), G. Sabouret (2001).
"Mentor"
for the Ronald E. McNair Post-Baccalaureate Achievement Program, and advisor
for student projects for the National Conference on Undergraduate Research.
Representative
Publications
Books
and Book/Journal Chapters
·
"Optical
Sensors," (Chapter) R. Sobolewski and D. P. Butler, to appear in: Handbook
of Superconducting Materials, Institute of Physics Publishing Ltd., Bristol, UK
(2002).
·
"Hot-Electron
Effect in Superconductors and its Applications for Radiation Sensors"
Topical review article, A. Semenov, G. N. Gol'tsman, and R. Sobolewski,
Supercon. Sc. & Tech. 15, pp. R1-R16 (2002).
·
"Yttrium Barium
Copper Oxide as an Infrared Sensing Material," (Chapter) D. P. Butler, Z.
Celik- Butler, and R. Sobolewski in: Handbook of Advanced Electronic and
Photonic Materials and Devices, ed. by H. S. Nalwa, Vol. 3: High Tc
Superconductors and Organic Conductors, Chap. 4, pp. 169-195, Academic Press,
NY, (2001).
Refereed
Journals and Published Conference Proceedings
2002 Publications
·
"Femtosecond
Response of a Freestanding LT-GaAs Photoconductive Switch", X. Zheng, Y.
Xu, R. Sobolewski, R. Adam, M. Mikulics, M. Siegel, and P. Kordos, to appear in
Appl. Opt. (2002).
·
"Carrier Dynamics
in Metallic Superconducting and Nonsuperconducting Cuprates", M. L.
Schneider, J. Demsar, Yu. D. Glinka, A. Klimov, A. Krapf, S. Rast, Y. H. Ren,
W. Si, Y. Xu, X. H. Zeng, I. Bozovic, G. Lüpke, R. Manzke, R. Sobolewski, A. J.
Taylor, N. T. Tolk, X. X. Xi, R. Joynt, and M. Onellion, to appear in Phys.
Rev. Lett. (2002).
·
"Quantum Coherence
Model of Cooper Pair Recombination in Superconductors", R. Sobolewski, Y.
Xu, C. Williams, and J. Mostowski, to appear in Phys. Rev. Lett. (2002).
·
"Detection
Efficiency of Large-Active-Area NbN Single-Photon Superconducting Detectors in
the Ultraviolet to Near-Infrared Range ", A. Verevkin, J. Zhang, R.
Sobolewski, A. Lipatov, O. Okunev, G. Chulkova, A. Korneev, K. Smirnov, and G.
N. Gol'tsman, and A. Semenov, to appear in Appl. Phys. Lett. (2002).
·
"Resistive
Switching Dynamics in Current-Biased Y-Ba-Cu-O Microbridges Excited by
Nanosecond Electrical Pulses", G. Sabouret, C. Williams, and R.
Sobolewski, to appear in Phys. Rev. B (2002).
·
"Direct Measurements
of Energy Relaxation Times in Two-Dimensional Structures Under
Quasi-Equilibrium Conditions",(Invited), A. Verevkin, E. M. Gershenzon, G.
N. Gol'tsman, N. G. Ptitsina, G. Chulkova, K. Smirnov, and R. Sobolewski, in
Ultrafast Phenomena in Semiconductors 2001, edited by S. Asmontas, A. Dargys,
and H. G. Roskos, Materials Science Forum. Vols. 384-385, pp. 107-116 (2002).
·
"Magneto-Optical
Modulator for the Superconducting Digital Output Interface," R.
Rey-De-Castro, A. Verevkin, Y. Xu, A. Mycielski, and R. Sobolewski, in
OPTO-Canada: SPIE Regional Meeting on Optoelectronic, Photonics, and Imaging,
SPIE vol. TD01, pp. 41-43 (2002).
·
"Ultrafast Superconducting Single-Photon Optical
Detectors and Their Applications," (Invited), A. Verevkin, G. N.
Gol'tsman, and R. Sobolewski, in OPTO-Canada: SPIE Regional Meeting on
Optoelectronic, Photonics, and Imaging, SPIE vol. TD01, pp. 39-40 (2002).
·
"Fabrication and Subpicosecond Photoresponse of a
Novel LT-GaAs Photoconductive Switch," X. Zheng, Y. Xu, R. Adam, M.
Mikulics, M. Siegel, P. Kordos, and R. Sobolewski, in OPTO-Canada: SPIE
Regional Meeting on Optoelectronic, Photonics, and Imaging, SPIE vol. TD01, pp.
36-38 (2002).
·
"Time-resolved Characterization of NbN
Superconducting Single-Photon Optical Detectors," J. Zhang, A.
Verevkin, W. Slysz, G. Chulkova, A. Korneev, A. Lipatov, O. Okunev, G. N.
Gol'tsman, and R. Sobolewski, in OPTO-Canada: SPIE Regional Meeting on
Optoelectronic, Photonics, and Imaging, SPIE vol. TD01, pp. 33-35 (2002).
·
"Femtosecond
Optical Response of MgB2 superconducting thin films," Y. Xu, A. Plecenik,
and R. Sobolewski, in OPTO-Canada: SPIE Regional Meeting on Optoelectronic,
Photonics, and Imaging, SPIE vol. TD01, pp. 30-32 (2002).
·
"Spectral Sensitivity of the NbN Single-Photon
Superconducting Detector" (Invited), R. Sobolewski, Y. Xu, X. Zheng,
C. Williams, J. Zheng, A. Verevkin, G. Chulkova, A. Korneev, A. Lipatov, O.
Okunev, K. Smirnov, and G. N. Gol'tsman, IEICE Trans. Electron. E85-C, No. 3,
pp. 797-802 (2002).
·
"Experiments and Simulations of Picosecond Electrical
Pulse Modulation of Y-Ba-Cu-O Thin Films", C. Williams, G. Sabouret,
and R. Sobolewski, IEICE Trans. Electron. E85-C, No. 3, pp. 733-737 (2002).
2001
Publications
·
"New photon detector for device analysis:
Superconducting single-photon detector based on a hot electron effect",
S. Somani, S. Kasapi. K. Wilsher, W. Lo, R. Sobolewski and G. N. Gol'tsman, J.
Vac. Sci. Technol. B 19, No. 6, pp. 2766-2769 (2001).
·
"Low-temperature-grown
MBE GaAs for terahertz photomixers," M. Mikulics, M. Marso, R. Adam, A.
Fox, D. Buca, A. Förster P. Kordos, Y. Xu, and R. Sobolewski, in 2001 Int.
Symposium on Electron Devices for Microwave and Optoelectronic Applications,
EDMO2001, Vienna, Austria, IEEE Cat. No. 01TH8567, pp.155-159.
·
"Ultrafast
Optoelectronic Interface for Digital Superconducting
Electronics"(invited), R. Sobolewski, Supercon. Sc. & Tech. 14, pp.
994-1000 (2001).
·
"Picosecond superconducting single-photon optical
detector", G. N. Gol'tsman, O. Okunev, G. Chulkova, A. Lipatov, A.
Semenov, K. Smirnov, B. Voronov, A. Dzardanov, C. Williams, and R. Sobolewski,
Appl. Phys. Lett. 79, pp. 705-707 (2001).
·
"Photo-Induced
Changes of the In-Plane and Out-of-Plane Electronic Properties in
Y-Ba-Cu-O", C. Stockinger, G. Heine, W. Markowitsch, W. Lang, R. Adam, R.
Sobolewski, R. Rossler, J. D. Pedarnig, and D. Bauerle, J. Supercon. 14, pp.
311-315 (2001).
·
"Magneto-Optical
Modulator for Superconducting Digital Output Interface," R. Sobolewski and
J.-R. Park, IEEE Trans. Appl. Supercon. 11, pp. 727-730 (2001).
·
"Ultrafast YBCO
Photodetector Based on the Kinetic-Inductive Process," C. Williams, Y. Xu,
R. Adam, M. Darula, O. Harnack, J. Scherbel, M. Siegel, F. A. Hegmann, and R.
Sobolewski, IEEE Trans. Appl. Supercon. 11, pp. 578-581 (2001).
·
"Fabrication and
Properties of an Ultrafast NbN Hot-Electron Single Photon Detector," G. N.
Gol'tsman, O. Okunev, G. Chulkova, A. Lipatov, A. Semenov, K. Smirnov, B.
Voronov, A. Dzardanov, C. Williams, and R. Sobolewski, IEEE Trans. Appl.
Supercon. 11, pp. 574-577 (2001).
·
"Ultrafast
superconducting hot-electron single-photon detector," Y. Xu, X. Zheng, C.
Williams, A. Verevkin, R. Sobolewski, G. Chulkova, A. Lipatov, O. Okunev, K.
Smirnov, G.N. Gol'tsman, in Technical Digest of the Conference on Lasers and
Electro-Optics, CLEO2001, IEEE Cat. No.01CH37170, pp.345-346.
·
"Cooled and
Uncooled Infrared Detectors Based on Yttrium Barium Cooper Oxide"
(invited), R. Sobolewski, D. P. Butler, and Z. Celik-Butler, in: Smart Optical
Inorganic Structures and Devices, ed. by S. P. Asmontas and J. Gradauskas,
Proc. SPIE 4318, pp. 204-214 (2001).
Pre
2001 Publications
·
"Double Sign
Reversal of the Vortex Hall Effect in YBa2Cu3O7-x Thin Films in the Strong
Pinning Limit of Low Magnetic Fields," (with W. Gob, W. Liebich, W. Lang,
I. Puica, R. Rossler, J. D. Pedarnig, and D. Buerle), Phys. Rev. B 62,
9870 (2000).
·
"Photo-Induced
Increase of the Superconducting Coherence Lengths in Oxygen-Deficient Y-Ba-Cu-O
Thin Films", (with C. Stockinger, G. Heine, W. Markowitsch, W. Lang, R.
Adam, R. Rossler, J. D. Pedarnig, and D. Bauerle), Euro. Phys. J. B
18, 227 (2000).
·
"Extending
Scattering Parameter Approach to Characterization of Linear Time-Varying
Microwave Devices," (with K. Green), IEEE Tran. MTT. 48,
1725 (2000).
·
"Quasiparticle
Thermalization and Recombination in High-Temperature Superconductors Excited by
Femtosecond Optical Pulses," (invited) in: Lecture Notes in Physics:
New Developments in High Temperature Superconductivity, vol. 545, pp.
100-122 Springer-Verlag, Berlin/Heidelberg (2000).
·
"Picosecond Hot-Electron Energy
Relaxation in NbN Superconducting Photodetectors," (with K. S. Il'in,
M. Lindgren, M. Currie, A. D. Semenov, G. N. Gol’tsman, S. I. Cherednichenko,
and E. M. Gershenzon), Appl. Phys. Lett. 76, 2752 (2000).
·
"Direct observation of subpicosecond
single-flux-quantum generation in pulse-driven Y-Ba-Cu-O Josephson junctions,"
(with R. Adam, M. Currie, C. Williams, O. Harnack, and M. Darula), Appl.
Phys. Lett. 76, 469 (2000).
·
"Intrinsic Photoresponse Times of
Y-Ba-Cu-O Superconducting Photodetectors," (with M. Lindgren, M.
Currie, C. Williams, T. Y. Hsiang, P. M. Fauchet, S. H. Moffat, R. A. Hughes,
J. S. Preston and F. A. Hegmann), Appl. Phys. Lett., 74, 853
(1999).
·
"Pyroelectric
Effect in Ya-Ba-Cu-O Thin Films under Laser Illumination," (with D. P. Butler,
Z. Celik-Butler, and R. Adam), J. Appl. Phys. 85, 1075 (1999).
·
"Ultrafast
Dynamics of Nonequilibrium Quasiparticles in High-Temperature
Superconductors," (invited) in Superconducting and Related Oxides:
Physics and Nanoengineering III, Proc. SPIE. 3481, 480-491 (1998).
·
"Ultimate Quantum Efficiency of a
Superconducting Hot-Electron Photodetector," (with K. D. Il’in, I. I.
Milostnaya, A. A. Verevkin, G. N. Gol’tsman and E. M. Gershenzon) Appl.
Phys. Lett. 73, 3938 (1998).