18 research outputs found
Π‘Π°ΠΌΠΎΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΡ Π½Π°Π½ΠΎΡΠ°ΡΡΠΈΡ, ΠΊΠΎΠ½ΡΡΠΎΠ»ΠΈΡΡΠ΅ΠΌΠ°Ρ ΡΠ΅Π·ΠΎΠ½Π°Π½ΡΠ½ΡΠΌ Π»Π°Π·Π΅ΡΠ½ΡΠΌ ΠΏΠΎΠ»Π΅ΠΌ
The paper presents theoretical justification for the possibility of formation of nanoparticle structures with
the predefined configuration. The process of formation is the self-organized aggregation of nanoparticles
under the action of external resonant laser field. The formation of various nanostructures that contain
metallic and semiconducting nanoparticles with resonances in the visible spectrum is considered in the
dipole-dipole approximationΠ’Π΅ΠΎΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈ ΠΏΠΎΠΊΠ°Π·Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΡΡΡΠΊΡΡΡ ΠΈΠ· Π½Π°Π½ΠΎΡΠ°ΡΡΠΈΡ Ρ Π·Π°ΡΠ°Π½Π΅Π΅ Π·Π°Π΄Π°Π½Π½ΠΎΠΉ
ΠΊΠΎΠ½ΡΠΈΠ³ΡΡΠ°ΡΠΈΠ΅ΠΉ. ΠΡΠΎ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎ Π±Π»Π°Π³ΠΎΠ΄Π°ΡΡ ΡΠ²Π»Π΅Π½ΠΈΡ ΡΠ°ΠΌΠΎΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΠΈ Π½Π°Π½ΠΎΡΠ°ΡΡΠΈΡ ΠΏΠΎΠ΄ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ
Π²Π½Π΅ΡΠ½Π΅Π³ΠΎ ΡΠ΅Π·ΠΎΠ½Π°Π½ΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ Π»Π°Π·Π΅ΡΠ½ΠΎΠ³ΠΎ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ. Π€ΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
Π½Π°Π½ΠΎΡΡΡΡΠΊΡΡΡ, ΡΠΎΠ΄Π΅Ρ-
ΠΆΠ°ΡΠΈΡ
ΠΌΠ΅ΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈ ΠΏΠΎΠ»ΡΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΈΠΊΠΎΠ²ΡΠ΅ Π½Π°Π½ΠΎΡΠ°ΡΡΠΈΡΡ Ρ ΡΠ΅Π·ΠΎΠ½Π°Π½ΡΠ½ΠΎΠΉ Π΄Π»ΠΈΠ½ΠΎΠΉ Π²ΠΎΠ»Π½Ρ Π² Π²ΠΈΠ΄ΠΈΠΌΠΎΠΉ
ΠΎΠ±Π»Π°ΡΡΠΈ, ΡΡΠΈΡΠ°Π»ΠΎΡΡ Π² Π΄ΠΈΠΏΠΎΠ»Ρ-Π΄ΠΈΠΏΠΎΠ»ΡΠ½ΠΎΠΌ ΠΏΡΠΈΠ±Π»ΠΈΠΆΠ΅Π½ΠΈ
Laser-induced Interaction of Multilevel Quantum Dots
A theoretical model is developed for describing the laser-induced interaction of a pair of multilevel semi-
conductor quantum dots. Spectral dependencies of interaction energy are calculated in dipole-dipole ap-
proximation for a pair of CdSe quantum dots in a quasi-resonant laser field, for cases of two identical
quantum dots and those with differing transition wavelengths. Interaction energy of pair of multilevel
quantum dots in the long-wavelength potential well is much higher than that of pair of two-level quan-
tum dots. The increase of difference of resonance wavelengths of two interacting quantum dots leads to
decrease of the potential well depth
Laser-induced Interaction of Multilevel Quantum Dots
A theoretical model is developed for describing the laser-induced interaction of a pair of multilevel semi-
conductor quantum dots. Spectral dependencies of interaction energy are calculated in dipole-dipole ap-
proximation for a pair of CdSe quantum dots in a quasi-resonant laser field, for cases of two identical
quantum dots and those with differing transition wavelengths. Interaction energy of pair of multilevel
quantum dots in the long-wavelength potential well is much higher than that of pair of two-level quan-
tum dots. The increase of difference of resonance wavelengths of two interacting quantum dots leads to
decrease of the potential well depth
Π£ΡΠΈΠ»Π΅Π½ΠΈΠ΅ ΡΠ²Π΅ΡΠ° ΡΠ΅Π»Π΅ΠΊΡΠΈΠ²Π½ΠΎ ΠΏΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡΠΌ ΠΎΡΠΈΠ΅Π½ΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ»Π°ΠΌΠΈ Π² ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠΌ ΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΎΠΌ ΠΏΠΎΠ»Π΅
The possibility of inversionless amplification of light by dichroic molecules that can be oriented selectively
over states by application of an pulsed electric field is analyzed. The numerical simulation of the orien-
tation process of molecules in the external field is considered. As shown the conditions of inversionless
amplification with considering of transition between energetic levels may be implementedΠΠ½Π°Π»ΠΈΠ·ΠΈΡΡΠ΅ΡΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ Π±Π΅Π·ΡΠ½Π²Π΅ΡΡΠ½ΠΎΠ³ΠΎ ΡΡΠΈΠ»Π΅Π½ΠΈΡ ΡΠ²Π΅ΡΠ° Π΄ΠΈΡ
ΡΠΎΠΈΡΠ½ΡΠΌΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ»Π°ΠΌΠΈ, ΠΊΠΎΡΠΎΡΡΠ΅
ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΎΡΠΈΠ΅Π½ΡΠΈΡΠΎΠ²Π°Π½Ρ ΡΠ΅Π»Π΅ΠΊΡΠΈΠ²Π½ΠΎ ΠΏΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡΠΌ ΠΏΡΡΠ΅ΠΌ Π½Π°Π»ΠΎΠΆΠ΅Π½ΠΈΡ ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΡΠ»Π΅ΠΊ-
ΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ, ΡΡΠΎ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ ΠΏΠΎΠ²ΡΡΠΈΡΡ ΠΏΠΎΡΠΎΠ³ ΠΏΡΠΎΠ±ΠΎΡ ΡΡΠ΅Π΄Ρ. ΠΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ ΡΠΈΡΠ»Π΅Π½Π½ΠΎΠ΅
ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠΎΡΠ΅ΡΡΠ° ΠΎΡΠΈΠ΅Π½ΡΠ°ΡΠΈΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ» Π²ΠΎ Π²Π½Π΅ΡΠ½Π΅ΠΌ ΠΏΠΎΠ»Π΅ Ρ ΡΡΠ΅ΡΠΎΠΌ ΠΏΠ΅ΡΠ΅Ρ
ΠΎΠ΄ΠΎΠ² ΠΌΠ΅ΠΆΠ΄Ρ ΡΠ½Π΅ΡΠ³Π΅-
ΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΡΡΠΎΠ²Π½ΡΠΌΠΈ ΠΈ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΡΡΠ»ΠΎΠ²ΠΈΡ Π±Π΅Π·ΡΠ½Π²Π΅ΡΡΠ½ΠΎΠ³ΠΎ ΡΡΠΈΠ»Π΅Π½ΠΈΡ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΡΠ΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Π½
Π£ΡΠΈΠ»Π΅Π½ΠΈΠ΅ ΡΠ²Π΅ΡΠ° ΡΠ΅Π»Π΅ΠΊΡΠΈΠ²Π½ΠΎ ΠΏΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡΠΌ ΠΎΡΠΈΠ΅Π½ΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ»Π°ΠΌΠΈ Π² ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠΌ ΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΎΠΌ ΠΏΠΎΠ»Π΅
The possibility of inversionless amplification of light by dichroic molecules that can be oriented selectively
over states by application of an pulsed electric field is analyzed. The numerical simulation of the orien-
tation process of molecules in the external field is considered. As shown the conditions of inversionless
amplification with considering of transition between energetic levels may be implementedΠΠ½Π°Π»ΠΈΠ·ΠΈΡΡΠ΅ΡΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ Π±Π΅Π·ΡΠ½Π²Π΅ΡΡΠ½ΠΎΠ³ΠΎ ΡΡΠΈΠ»Π΅Π½ΠΈΡ ΡΠ²Π΅ΡΠ° Π΄ΠΈΡ
ΡΠΎΠΈΡΠ½ΡΠΌΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ»Π°ΠΌΠΈ, ΠΊΠΎΡΠΎΡΡΠ΅
ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΎΡΠΈΠ΅Π½ΡΠΈΡΠΎΠ²Π°Π½Ρ ΡΠ΅Π»Π΅ΠΊΡΠΈΠ²Π½ΠΎ ΠΏΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡΠΌ ΠΏΡΡΠ΅ΠΌ Π½Π°Π»ΠΎΠΆΠ΅Π½ΠΈΡ ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΡΠ»Π΅ΠΊ-
ΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ, ΡΡΠΎ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ ΠΏΠΎΠ²ΡΡΠΈΡΡ ΠΏΠΎΡΠΎΠ³ ΠΏΡΠΎΠ±ΠΎΡ ΡΡΠ΅Π΄Ρ. ΠΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ ΡΠΈΡΠ»Π΅Π½Π½ΠΎΠ΅
ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠΎΡΠ΅ΡΡΠ° ΠΎΡΠΈΠ΅Π½ΡΠ°ΡΠΈΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ» Π²ΠΎ Π²Π½Π΅ΡΠ½Π΅ΠΌ ΠΏΠΎΠ»Π΅ Ρ ΡΡΠ΅ΡΠΎΠΌ ΠΏΠ΅ΡΠ΅Ρ
ΠΎΠ΄ΠΎΠ² ΠΌΠ΅ΠΆΠ΄Ρ ΡΠ½Π΅ΡΠ³Π΅-
ΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΡΡΠΎΠ²Π½ΡΠΌΠΈ ΠΈ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΡΡΠ»ΠΎΠ²ΠΈΡ Π±Π΅Π·ΡΠ½Π²Π΅ΡΡΠ½ΠΎΠ³ΠΎ ΡΡΠΈΠ»Π΅Π½ΠΈΡ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΡΠ΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Π½
Π€ΠΎΡΠΎΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΡΡΡ ΠΊΠΎΠ»Π»ΠΎΠΈΠ΄Π½ΡΡ ΠΊΠ²Π°Π½ΡΠΎΠ²ΡΡ ΡΠΎΡΠ΅ΠΊ CdTe ΠΈ Π³ΡΠ°ΡΠ΅Π½ΠΎΠ²ΡΡ ΠΊΠ²Π°Π½ΡΠΎΠ²ΡΡ ΡΠΎΡΠ΅ΠΊ ΠΏΡΠΈ ΠΈΡ ΠΎΠ±Π»ΡΡΠ΅Π½ΠΈΠΈ Π½Π΅ΠΏΡΠ΅ΡΡΠ²Π½ΡΠΌ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΠ΅ΠΌ Π² Π²ΠΈΠ΄ΠΈΠΌΠΎΠΌ ΠΈ Π£Π€-Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π°Ρ
In the last decade, ultraviolet detectors have received significant attention due to their
widespread use in civil and military fields. In this work, we have studied the effect of radiation of different
ranges (UV and visible) on the spectral properties of CdTe quantum dots and wide-gap graphene QDs.
The results obtained can be used to create an integrated UV radiation detector based on new physical
principlesΠ ΠΏΠΎΡΠ»Π΅Π΄Π½Π΅Π΅ Π΄Π΅ΡΡΡΠΈΠ»Π΅ΡΠΈΠ΅ ΡΠ»ΡΡΡΠ°ΡΠΈΠΎΠ»Π΅ΡΠΎΠ²ΡΠ΅ Π΄Π΅ΡΠ΅ΠΊΡΠΎΡΡ ΠΏΡΠΈΠ²Π»Π΅ΠΊΠ»ΠΈ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠ΅ Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ ΠΈΠ·-Π·Π° ΠΈΡ
ΡΠΈΡΠΎΠΊΠΎΠ³ΠΎ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ Π² Π³ΡΠ°ΠΆΠ΄Π°Π½ΡΠΊΠΎΠΉ ΠΈ Π²ΠΎΠ΅Π½Π½ΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΡΡ
. Π Π½Π°ΡΡΠΎΡΡΠ΅ΠΉ ΡΠ°Π±ΠΎΡΠ΅
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ ΡΠ°Π·Π½ΡΡ
Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½ΠΎΠ² (Π£Π€- ΠΈ Π²ΠΈΠ΄ΠΈΠΌΠΎΠ³ΠΎ) Π½Π° ΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π°
ΠΊΠ²Π°Π½ΡΠΎΠ²ΡΡ
ΡΠΎΡΠ΅ΠΊ CdTe ΠΈ ΡΠΈΡΠΎΠΊΠΎΠ·ΠΎΠ½Π½ΡΡ
Π³ΡΠ°ΡΠ΅Π½ΠΎΠ²ΡΡ
ΠΠ’. ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ Π΄Π»Ρ ΡΠΎΠ·Π΄Π°Π½ΠΈΡ ΠΈΠ½ΡΠ΅Π³ΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π΄Π΅ΡΠ΅ΠΊΡΠΎΡΠ° Π£Π€-ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ Π½Π° Π½ΠΎΠ²ΡΡ
ΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΈΠ½ΡΠΈΠΏΠ°