Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Dimitri Dr. Kovalev"'
Publikováno v:
physica status solidi (c). 2:3268-3272
We report on a medium exhibiting extremely efficient light scattering properties: a liquid network formed in a porous matrix. Liquid fragments confined in the solid matrix result in a random fluctuation of the dielectric function and act as scatterin
Publikováno v:
physica status solidi (c). 2:3188-3192
We report on the mechanism of photodegradation of hydrogenated porous silicon luminescence in ambients containing molecular oxygen. Energy transfer from excitons confined in silicon nanocrystals assembling porous silicon layers to molecular oxygen re
Publikováno v:
physica status solidi (a). 202:1432-1436
Anisotropic nanostructuring of bulk silicon (Si) wafers leads to a significant in-plane optical anisotropy of single porous silicon (PSi) layers. Additionally a variation of the etching current in time allows a controlled modification of the porosity
Publikováno v:
physica status solidi (a). 197:582-585
Electro-chemical etching of heavily doped, (110) oriented, p + (boron) doped silicon wafers results in porous silicon (PSi) layers which exhibit a strong in-plane anisotropy of the refractive index (birefringence). Single- and multiple layers of anis
Publikováno v:
Microelectronic Engineering. 59:291-294
Studying the heating of oxidized porous Si excited by IR-pulses from a CO2 laser we observe a time delay of a fraction of a μs for some infrared frequencies. For 1030 cm−1 the transfer of energy is nearly instantaneous. We discuss the implications
Publikováno v:
Optical Materials. 17:117-120
Visible photoluminescence (PL) from silicon nanocrystals (NCs) in porous silicon (PSi) at two-photon excitation (two-photon absorption) has been studied. For resonant excitation at low temperatures the PL response near to the excitation energy differ
Publikováno v:
Optical Materials. 17:35-40
The purpose of the paper is to survey the experimental work which has been carried out towards detailed understanding of the basic optical properties of silicon nanocrystals. We would like to demonstrate that all general expectations for the behaviou
Publikováno v:
physica status solidi (b). 224:297-300
The morphology of porous silicon layers has been investigated by polarization resolved photoluminescence measurements in different geometrical arrangements. A uniaxial alignment of the long ellipsoidal axis of the aspheric Si nanocrystallites (NCs) p
Publikováno v:
physica status solidi (a). 182:341-345
Publikováno v:
physica status solidi (a). 182:379-383