Temat: 78.55.Bg - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Remarks on Fluorescence Concentration Quenching of Rhodamine 6G in Methanol
Autorzy:: Bojarski, C.
Bujko, R.
Bojarski, P.
Powiązania:: https://bibliotekanauki.pl/articles/1887297.pdf
Data publikacji:: 1991-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 33.50.-j
78.55.Bg
Opis:: It has been shown that the concentration changes in the quantum yield η and decay time τ of fluorescence of rhodamine 6G in methanol can be explained quantitatively by non-radiative excitation energy transport (NET) from monomers to quenching centres considered as perfect traps. The good agreement of the experimental data with the theoretical curves for the critical radii R$\text{}_{OMM}$ = 55.4Ǻ and R$\text{}_{OMT}$ = 51.8Ǻ determined spectroscopically has been obtained. The excitation energy migration and the concentration dependence on the orientation factor occurring in the Förster rate for the NET have been taken into account. The nature of the quenching centres and the effect of material diffusion of active molecules on η and τ have been discussed.
Źródło:: Acta Physica Polonica A; 1991, 79, 4; 471-478
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Coherence of Electron Photoexcitation by Extremely Short Strong Light Pulses
Autorzy:: Kalvová, A.
Velický, B.
Powiązania:: https://bibliotekanauki.pl/articles/1991545.pdf
Data publikacji:: 1998-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.Eq
72.10.Bg
78.47.+p
Opis:: For a semiconductor alloy with a predominant disorder scattering, we show that, under appropriate conditions, electrons photoexcited by a short strong light pulse form a coherent transient at first, while the incoherently backscattered electrons take over only gradually, with a time lag comparable with the pulse duration. The time evolution of the electron distribution is obtained by a direct evaluation of the non-equilibrium Green function.
Źródło:: Acta Physica Polonica A; 1998, 94, 3; 374-378
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Quasiparticle Formation and Decay in Pulsed Photoexcitation of Disordered Semiconductors
Autorzy:: Kalvová, A.
Velický, B.
Powiązania:: https://bibliotekanauki.pl/articles/1968120.pdf
Data publikacji:: 1997-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.Eq
72.10.Bg
78.47.+p
Opis:: The quasiparticle states in strongly illuminated semiconductors are light hybridized electron and hole states, Galickii quasiparticles. Their properties, especially if they are photoexcited at small detunings, may be rather complex. A protracted formation period is followed by quantum beats of two decaying resonances corresponding to both sides of the hybridization gap. On an example of elastic scattering on an alloy disorder, these phenomena are demonstrated and analyzed in terms of poles of the retarded Green function and the corresponding residuals.
Źródło:: Acta Physica Polonica A; 1997, 92, 4; 809-814
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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