Czesław KOEPKE
SOLID STATE PHYSICS
SOLID STATE SPECTROSCOPY
ul. Grudziądzka 5/7, 87-100 Toruń
tel.: (56) 611-3239, fax.: (56) 622-5397, e-mail: koepke@phys.uni.torun.pl
Education:
Employment: Nicholas Copernicus University,
Institute of Physics – Postgraduate Student (1976-79), Member of technical
staff (1979), Assistant Lecturer (1982), Lecturer, Adjunct (1984); Boston
University, Chemistry Department – Research Associate (1988-91); Nicholas
Copernicus University – Senior Lecturer, Dr. hab. (1994), Vice-Director
of the Institute of Physics (1995-2006), Extraordinary Professor (1999),
Professor (2006), Ordinary Professor (2009)
Activities: Physics of the lasers, optical
nonlinearities in semiconductors, solid state spectroscopy, photonics,
excited-state spectroscopy. First observations and interpretations of the
excited state absorption in d0 molecular complexes in solids,
discovery and interpretation of the excited-state photochromism
in solids (bismuth germanate). Observation and
interpretation of the excited-state absorption characteristics in various
glasses, glass ceramics and crystals doped with transition metal (mostly
chromium of various valence states) and rare earth (e.g. holmium, neodymium,
praseodymium) ions. Observation and interpretation of various anti-Stokes and upconversion emissions in rare earth – activated glasses,
glass ceramics and crystals.
Honours and memberships: Polish Physical Society
Selected papers: Optical Nonlinearities and Bistability in Semiconductors, Acta
Phys. Polon. A 75, 219 (1989); Cz.
Koepke, A. Lempicki, Electronic
Photochromism: Case Study of Bismuth Germanate, J. Luminescence 47, 227 (1991); Cz. Koepke, A.J. Wojtowicz, and A. Lempicki, Excited-State
Absorption in Excimer-Pumped CaWO4
Crystals, J. Luminescence, 54, 345 (1993); Cz. Koepke, A.J. Wojtowicz, and A. Lempicki, Study of Closed-Shell Molecular Complexes as
Possible Laser Media, IEEE J. Quant. Electronics, QE-31, 1554 (1995); Cz. Koepke, K. Wiśniewski, M. Grinberg, D.L.
Russell, K. Holliday, and G.H. Beall, Excited
State Absorption in Cr3+-Doped Gahnite Glass Ceramics, J.
Luminescence, 78, 135 (1998); Cz. Koepke,
K. Wisniewski, and M. Naftaly, Optical spectroscopy and multiple-line gain in Pr3+-
activated fluoroaluminate glass, J. Phys.: Condens. Matter 14, 6785 (2002); Cz.
Koepke, K. Wisniewski, M. Grinberg
and F. Rozploch, Excited
state spectroscopy of the silica sol-gel glass activated by Cr5+ and
Cr6+ ions, J. Phys.: Condens. Matter
14, 11553 (2002); Cz.
Koepke, K. Wisniewski, L. Sikorski,
D. Piatkowski, K. Kowalska
and M. Naftaly, Upconverted luminescence under 800 nm
laser diode excitation In Nd3+- activated fluoroaluminate
glass, Opt. Mater. 28, 129 (2006); D. Piątkowski, K. Wiśniewski, M. Różański, Cz. Koepke,
M. Kaczkan, M. Klimczak, R.
Piramidowicz, M. Malinowski, „Excited state
absorption spectroscopy of ZBLAN:Ho3+ glass - experiment and
simulation”, J. Phys.: Cond. Matter 20 (2008) 155201; Cz. Koepke, K. Wiśniewski, D. Piątkowski,
„Broadband (~ 300 nm) optical gain in the ZAS (ZrO2-Al2O3-SiO2)
glass activated by chromium”, Opt. Mater. 31 (2009) 537; Cz. Koepke, K. Wiśniewski, D. Piątkowski, M. Malinowski, „Competition between two types
of anti-Stokes emission in Ho3+- activated ZBLAN glass”, J. Phys.:
Cond. Matter 21 (2009) 035113; P. Stremplewski, C. Koepke, D. Piatkowski, M. Rozanski, „Nonmonotonic saturation characteristic and excited state
absorption in long optical fiber”, Appl Phys B 103
(2011) 123; P. Stremplewski, Cz. Koepke, “ASE noise
independent small signal modal gain measurements and mode imaging in double
clad Nd3+- doped fiber around 900 nm”, Optics Express 22 (2014)
24847, P. Stremplewski, Cz.
Koepke, “Up-converted emission and mode beating in Er3+-
doped fibers”, Optics Express 23 (2015) 28288-28299. Total number
of papers: >70.
Born: 1952 Chełmno;
Married (1977), Children:
son (1979).
Hobbies: music, jazz, architecture, modern
art. and modern literature.