Direct bandgap optical transitions in Si nanocrystals (2009)
Prokofiev, A. A., Moskalenko, A. S., Yassievich, I. N., Timmerman, D., Zhang, H., ...
It is demonstrated that for spherical silicon dots, quantum confinement leads to the decrease of the direct energy gap at the $\Gamma$-point. We postulate to identify the efficient blue emission from...
Energy transfer processes in Er-doped SiO2 sensitized with Si nanocrystals (2008)
Izeddin, I., Timmerman, D., Gregorkiewicz, T., Moskalenko, A. S., Prokofiev, A. A., Yassievich, I. N., ...
We present a high-resolution photoluminescence study of Er-doped SiO2 sensitized with Si nanocrystals (Si NCs). Emission bands originating from recombination of excitons confined in Si NCs and of...
Space-separated quantum cutting with silicon nanocrystals for photovoltaic applications (2008)
Timmerman, D., Izeddin Aguirre, I., Stallinga, P. Dr., Yassievich, I.N., Gregorkiewicz, T.
For optimal energy conversion in photovoltaic devices (electricity to and from light) one important requirement is that the full energy of the photons is used. However, in solar cells, a single...
Mid-infrared spectroscopy of the Er-related donor state in Si/Si:Er3+ nanolayers (2008)
Izeddin, I., Klik, M.A.J., Vinh, N.Q., Bresler, M.S., Gregorkiewicz, T.
We present experimental evidence on the donor level related to optical properties of the Er3+ ion in crystalline silicon. Using two-color spectroscopy with a free-electron laser we provide a direct...
Vrielinck, H., Zverev, D., Smet, P.F., Poelman, D., Gregorkiewicz, T., Callens, F.
Ce3+- and Th3+-activated K2YF5 crystals, which have been shown to exhibit thermoluminescence (TL) response to alpha, beta, gamma and X-rays, are investigated using electron paramagnetic resonance...
Energy transfer in Er-doped SiO2 sensitized with Si nanocrystals (2008)
Izeddin, I., Timmerman, D., Gregorkiewicz, T., Moskalenko, A.S., Prokofiev, A.A., Yassievich, I.N., ...
We present a high-resolution photoluminescence study of Er-doped SiO2 sensitized with Si nanocrystals (Si NCs). Emission bands originating from recombination of excitons confined in Si NCs, internal...
Pump-probe investigations of THz transitions in Si/Si:Er3+ nanolayers (2008)
Minissale, S., Vinh, N.Q., Gregorkiewicz, T.
A possibility to realize optical transitions within the I-4(15/2) ground state of Er3+ ion in Si, between levels split by crystal-field, has been investigated by pump-probe technique. The study has...
Minissale, S., Vinh, N.Q., Boer, W. De, Bresler, M.S., Gregorkiewicz, T.
Influence of oxygen on optical activity and thermal stability of the 1.5 µm emission of Er3+ ions in Si is well documented. Here we support this predominantly phenomenological notion with...
Theoretical modeling of thermally activated quenching processes in Si:Er (2006)
Prokofiev, A.A., Yassievich, I.N., Vrielinck, H., Gregorkiewicz, T.
Er-doped electro-optical memory element for 1.5 μm photonics (2006)
Gregorkiewicz, T., Andreev, B., Forcales, M., Izeddin Aguirre, I., Jantsch, W., Krasil'nik, Z.F., ...
1.54 μm Si: Er diode with memory function (2006)
Andreev, B., Gregorkiewicz, T., Jantsch, W., Krasil'nik, Z.F., Kryzhkov, D.I., Kuznetsov, V.P.
Isotope dependence of the lifetime of the 1136 cm-1 vibration of oxygen in silicon (2006)
Kohli, K.K., Davies, G., Vinh, N.Q., West, D., Estreicher, S.K., Gregorkiewicz, T., ...
On optical activity of Er3+ ions in Si-rich SiO2 waveguides (2006)
Minissale, S., Gregorkiewicz, T., Forcales, M., Elliman, R.G.
Microscopic theory of erbium ion de-excitation processes in silicon (2006)
PROKOFIEV, AA, YASSIEVICH, IN, Vrielinck, Henk, GREGORKIEWICZ, T
On 2.7 μm emission from Er-doped large bandgap hosts (2005)
Vrielinck, H., Izeddin, I., Ivanov, V., Gregorkiewicz, T., Callens, F., Lee, D.S., ...
Erbium doped silicon single- and multilayer structures for LED and laser applications (2005)
Krasil'nik, Z.F., Andreev, B., Gregorkiewicz, T., Jantsch, W., Klik, M.A.J., Kryzhkov, D.I., ...
Photoluminescence excitation spectroscopy of erbium in epitaxially grown Si:Er structures (2005)
Yablonskiy, A.N., Klik, M.A.J., Andreev, B., Kuznetsov, V.P., Krasil'nik, Z.F., Gregorkiewicz, T.
THz modulation of blue photoluminescence in ZnSe (2005)
Klik, M.A.J., Gregorkiewicz, T., Yassievich, I.N., Yu, W., Ivanov, V., Godlewski, M.
Erbium excitation in SiO2:Si-nc matrix under pulsed pumping (2005)
Gusev, O.B., Wojdak, M.B., Klik, M.A.J., Forcales, M., Gregorkiewicz, T.
Erbium photoluminescence excitation spectroscopy in Si:Er epitaxial strucures (2005)
Andreev, B., Krasil'nik, Z.F., Kuznetsov, V.P., Gregorkiewicz, T., Klik, M.A.J., Yablonskiy, A.N.
Theoretical modeling of thermally activated quenching processes in Si:Er (2005)
Prokofiev, A.A., Yassievich, I.N., Vrielinck, H., Gregorkiewicz, T.
Theoretical modeling of thermally activated luminescence quenching processes in Si : Er (2005)
PROKOFIEV, AA, YASSIEVICH, IN, Vrielinck, Henk, GREGORKIEWICZ, T
On 2.7 mu m emission from Er-doped large bandgap hosts (2005)
Vrielinck, Henk, IZEDDIN, I, IVANOV, VY, GREGORKIEWICZ, T, Callens, Freddy, Lee, Dong, ...
Er3+ photoluminescence excitation spectra in erbium-doped epitaxial silicon structures (2004)
Andreev, B.A., Krasil'nik, Z.F., Kryzhkov, D.I., Yablonskii, A.N., Kuznetsov, V.P., Gregorkiewicz, T., ...
Excitation spectra of erbium photoluminescence (λ = 1540 nm) in Si : Er epitaxial structures were studied within a broad pump wavelength range (λ = 780–1500 nm). Erbium photoluminescence was...
Optical properties of a single type of optically active center in Si/Si:Er nano-structures (2004)
Vinh, N.Q., Przybylinska, H., Krasil'nik, Z.F., Gregorkiewicz, T.
Terahertz-assisted excitation of the 1.5mm photoluminescence of Er in crystalline Si (2004)
Moskalenko, A.S., Yassievich, I.N., Forcales Fernandez, M., Klik, M.A.J., Gregorkiewicz, T.
Sensitization of Er luminescence by Si nanoclusters (2004)
Wojdak, M.B., Klik, M.A.J., Forcales Fernandez, M., Gusev, O.B., Gregorkiewicz, T., Pacifici, D., ...
Microscopic structure of Er-related optically active centers in Si (2003)
Przybylinska, H., Vinh, N.Q., Andreev, B.A., Krasil'nik, Z.F., Gregorkiewicz, T.
Free-electron laser spectroscopy of optically doped semiconductors (2003)
Gregorkiewicz, T., Forcales Fernandez, M., Klik, M.A.J., Bradley, I.V., Wells, J.P.R.
Si nanocrystals as sensitizers for Er PL in SiO2 (2003)
Forcales Fernandez, M., Wojdak, M.B., Klik, M.A.J., Gregorkiewicz, T., Gusev, O.B., Franzo, G., ...
Photoluminescence of GaN layers studied with two-color spectroscopy (2003)
Wojdak, M.B., Klik, M.A.J., Forcales Fernandez, M., Gregorkiewicz, T., Wells, J.P.R., Pakula, K., ...
Magneto-optical study of Er3+-related center in selectively doped Si:Er (2003)
Vinh, N.Q., Przybylinska, H., Krasil'nik, Z.F., Gregorkiewicz, T.
Microscopic structure of Er-related optically active center in crystalline Si (2003)
Vinh, N.Q., Przybylinska, H., Krasil'nik, Z.F., Gregorkiewicz, T.
Two-color mid-infrared spectroscopy of optically doped semiconductors (2003)
Forcales Fernandez, M., Klik, M.A.J., Vinh, N.Q., Philips, J., Wells, J.P.R., Gregorkiewicz, T.
Optical properties of a silver-related defect in silicon (2003)
Davies, G., Gregorkiewicz, T., Zafar Iqbal, M., Kleverman, M., Lightowlers, E.C., Vinh, N.Q., ...
Excitation cross section of erbium in semiconductor matrices under optical pumping (2002)
Gusev, O.B., Bresler, M.S., Pak, P.E., Yassievich, I.N., Forcales Fernandez, M., Vinh, N.Q., ...
Optically induced de-excitation of RE ions in a semiconductor matrix (2002)
Klik, M.A.J., Gregorkiewicz, T., Bradley, I.V., Wells, J.P.R.
Afterglow effect in photoluminescence of Si:Er (2002)
Forcales Fernandez, M., Gregorkiewicz, T., Bradley, I.V., Wells, J.P.R.
Temporal characteristics of the optical storage effect in Si:Er (2001)
Forcales Fernandez, M., Bradley, I.V., Wells, J.P.R., Gregorkiewicz, T.
Time-resolved investigation of the mid-infrared-induced enhancement of Er3+ emission in Si (2001)
Forcales Fernandez, M., Bradley, I.V., Wells, J.P.R., Gregorkiewicz, T.
Observation of Zeeman effect in photoluminescence of Er3+ ion in crystalline silicon (2001)
Vinh, N.Q., Przybylinska, H., Krasil?nik, Z.F., Andreev, B.A., Gregorkiewicz, T.
Optically induced Auger recombination of Yb3+ in p-type InP (2001)
Klik, M.A.J., Bradley, I.V., Wells, J.P.R., Gregorkiewicz, T.
Mid-infrared induced quenching of photoluminescence in Si:Er (2001)
Forcales Fernandez, M., Bradley, I.V., Wells, J.P.R., Gregorkiewicz, T.
Excitation cross-section of erbium in semiconductor matrices under optical pumping (2001)
Gusev, O.B., Bresler, M.S., Pak, P.E., Yassievich, I.N., Forcales Fernandez, M., Vinh, N.Q., ...
Experimental investigation of band structure modification in silicon nanocrystals (2001)
Pawlak, B., Gregorkiewicz, T., Ammerlaan, C.A.J., Takkenberg, W., Tichelaar, F.D., Alkemade, P.F.A.
Experimental investigation of band structure modification in silicon nanocrystals (2001)
Pawlak, B.J., Gregorkiewicz, T., Ammerlaan, C.A.J., Takkenberg, W., Tichelaar, W.F.D., Alkemade, P.F.A.
Energy Transfer Between Shallow Centers and RE Ion Core: Er3+ Ion in Silicon, (2000)
Gregorkiewicz, T., Thao, D.T.X., Langer, J.M., Bresler, M.S., Michel, J., ...
Energy Transfer Between Shallow Centers and RE Ion Core: Er3+ Ion in Silicon, (1999)
Gregorkiewicz, T., Thao, D.T.X., Langer, J.M., Bresler, M.S., Michel, J.
Mechanism of Excitation of Erbium Electroluminescence in Amorphous Silicon, (1999)
Bresler, M.S., Fuhs, W., Gregorkiewicz, T., Gusev, O.B., Pak, P.E., Terukov, E.I., ...
Effective Auger Excitation of Erbium Luminescence by Hot Electrons in Silicon, (1999)
Bresler, M.S., Gregorkiewicz, T., Gusev, O.B., Pak, P.E., Yassievich, I.N.
Photoluminescence of Erbium-doped Silicon: Temperature Dependence (1999)
Ammerlaan, C.A.J., Thao, D.T.X., Gregorkiewicz, T., Andreev, B.A., Krasil'nik, Z.F.
Excitation Mechanism of Er in Si Studied with a Free-electron Laser (1999)
Gregorkiewicz, T., Tsimperidis, I., Thao, D.T.X., Michel, J., ...
Newman, R.C., Ashwin, M.J., Pritchard, R.E., Tucker, J.H., Lightowlers, E.C., Gregorkiewicz, T., ...
High-field spectroscopy of thermal donors in silicon (1997)
Dirksen, R.J., Berg Rasmussen, F., Gregorkiewicz, T., Ammerlaan, C.A.J.
Pritchard, R.E., Ashwin, M.J., Tucker, J.H., Newman, R.C., Lightowlers, E.C., Gregorkiewicz, T., ...
Annealing behavior of crystalline silicon heavily implanted with oxygen at low temperature (1997)
Bercu, M., Zevenbergen, I.S., Gregorkiewicz, T., Ammerlaan, C.A.J., Tate, T., Ivanov, E.
The 4f intrashell transitions of ytterbium in indium phosphide (1996)
Maat-Gersdorf, I. De, Gregorkiewicz, T., Ammerlaan, C.A.J., Christianen, P.C.M., Maan, J.C.
Optically studied spin relaxation processes in CdMnTe (1996)
Godlewski, M., Wolf, B., Galazka, R.R., Monemar, B., Gregorkiewicz, T., Ammerlaan, C.A.J., ...
Magnetic resonance investigations of thermal donors in silicon (1996)
Ammerlaan, C.A.J., Zevenbergen, I., Martynov, Y.V., Gregorkiewicz, T.
Newman, R.C., Tucker, J.H., Semaltianos, N.G., Lightowlers, E.C., Gregorkiewicz, T., Zevenbergen, I., ...
Hydrogen passivation of double donors in silicon (1996)
Martynov, Y.V., Zevenbergen, I., Gregorkiewicz, T., Ammerlaan, C.A.J.
Magnetic resonance spectroscopy of hydrogen-passivated double donors in silicon (1996)
Zevenbergen, I., Martynov, Y.V., Berg Rasmussen, F., Gregorkiewicz, T., Ammerlaan, C.A.J.
Paramagnetic state of Hdrogen-Passivated Double-Donor Centers in Silicon (1995)
Gregorkiewicz, T., Zevenbergen, I., Martynov, Y.V., Ammerlaan, C.A.J.
Role of electron traps in the excitation and de-excitation mechanism of Yb3+ in InP (1995)
Tsimperides, I., Gregorkiewicz, T., Ammerlaan, C.A.J., Godlewski, M., Scholz, F., Lambert, B.
Photoluminescence measurements on erbium-doped silicon (1995)
Maat-Gersdorf, I. De, Gregorkiewicz, T., Ammerlaan, C.A.J., Sobolev, N.A.
Free Carriers Heating at Mn2+ Magnetic Resonance in CdMnTe (1995)
Godlewski, M., Galazka, R.R., Tsimperides, I., Gregorkiewicz, T., Ammerlaan, C.A.J.
Ligand ENDOR on substitutional manganese in GaAs (1994)
Ezhevskii, A.A., Son, N.T., Gregorkiewicz, T., Ammerlaan, C.A.J.
EPR spectroscopy of platinum-hydrogen complexes in silicon (1994)
Hohne, M., Juda, U., Martynov, Y.V., Gregorkiewicz, T., Ammerlaan, C.A.J., Vlasenko, L.S.
EPR study of platinum-hydrogen complexes in silicon (1994)
Hohne, M., Juda, U., Martynov, Y.V., Gregorkiewicz, T., Ammerlaan, C.A.J., Vlasenko, L.S.
Electron paramagnetic resonance study of the NL51 spectrum in hydrogen-implanted silicon (1994)
Stallinga, P., Gregorkiewicz, T., Ammerlaan, C.A.J., Gorelkinskii, YU.V.
EPR identification of hydrogen molecules in bulk silicon (1994)
Stallinga, P., Gregorkiewicz, T., Ammerlaan, C.A.J., Gorelkinskii, YU.V.
Photoluminescence of silicon thermal donors (1993)
Heijmink Liesert, B.J., Gregorkiewicz, T., Ammerlaan, C.A.J.
Electron-paramagnetic-resonance of molecular-hydrogen in silicon (1993)
Stallinga, P., Gregorkiewicz, T., Ammerlaan, C.A.J., Gorelkinskii, Y.V.
Electron-Paramagnetic-Resonance Identification of Silver Centers in Silicon (1992)
Son, N.T., Kustov, V.E., Gregorkiewicz, T., Ammerlaan, C.A.J.
©19xx American Physical Society
High-Resolution Epr Spectroscopy of the Si-Nl10 Thermal Donor (1992)
Gregorkiewicz, T., Bekman, Hhpt, Ammerlaan, C.A.J., Knap, W., Brunel, L.C., Martinez, G.
Magnetic-Resonance Studies of Interstitial Mn in Gap and Gaas (1991)
Vangisbergen, Sjchm, Godlewski, T., Gregorkiewicz, T., Ammerlaan, C.A.J.