18 research outputs found

    Бамоорганизация наночастиц, контролируСмая рСзонансным Π»Π°Π·Π΅Ρ€Π½Ρ‹ΠΌ ΠΏΠΎΠ»Π΅ΠΌ

    Get PDF
    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 approximationВСорСтичСски ΠΏΠΎΠΊΠ°Π·Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ формирования структур ΠΈΠ· наночастиц с Π·Π°Ρ€Π°Π½Π΅Π΅ Π·Π°Π΄Π°Π½Π½ΠΎΠΉ ΠΊΠΎΠ½Ρ„ΠΈΠ³ΡƒΡ€Π°Ρ†ΠΈΠ΅ΠΉ. Π­Ρ‚ΠΎ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎ благодаря явлСнию самоорганизации наночастиц ΠΏΠΎΠ΄ дСйствиСм внСшнСго рСзонансного поля Π»Π°Π·Π΅Ρ€Π½ΠΎΠ³ΠΎ излучСния. Π€ΠΎΡ€ΠΌΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹Ρ… наноструктур, содСр- ΠΆΠ°Ρ‰ΠΈΡ… мСталличСскиС ΠΈ ΠΏΠΎΠ»ΡƒΠΏΡ€ΠΎΠ²ΠΎΠ΄Π½ΠΈΠΊΠΎΠ²Ρ‹Π΅ наночастицы с рСзонансной Π΄Π»ΠΈΠ½ΠΎΠΉ Π²ΠΎΠ»Π½Ρ‹ Π² Π²ΠΈΠ΄ΠΈΠΌΠΎΠΉ области, ΡΡ‡ΠΈΡ‚Π°Π»ΠΎΡΡŒ Π² диполь-дипольном ΠΏΡ€ΠΈΠ±Π»ΠΈΠΆΠ΅Π½ΠΈ

    Laser-induced Interaction of Multilevel Quantum Dots

    Get PDF
    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

    No full text
    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

    УсилСниС свСта сСлСктивно ΠΏΠΎ состояниям ΠΎΡ€ΠΈΠ΅Π½Ρ‚ΠΈΡ€ΠΎΠ²Π°Π½Π½Ρ‹ΠΌΠΈ ΠΌΠΎΠ»Π΅ΠΊΡƒΠ»Π°ΠΌΠΈ Π² ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ½ΠΎΠΌ элСктричСском ΠΏΠΎΠ»Π΅

    No full text
    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 implementedАнализируСтся Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ бСзынвСрсного усилСния свСта Π΄ΠΈΡ…Ρ€ΠΎΠΈΡ‡Π½Ρ‹ΠΌΠΈ ΠΌΠΎΠ»Π΅ΠΊΡƒΠ»Π°ΠΌΠΈ, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ ΠΌΠΎΠ³ΡƒΡ‚ Π±Ρ‹Ρ‚ΡŒ ΠΎΡ€ΠΈΠ΅Π½Ρ‚ΠΈΡ€ΠΎΠ²Π°Π½Ρ‹ сСлСктивно ΠΏΠΎ состояниям ΠΏΡƒΡ‚Π΅ΠΌ налоТСния ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ½ΠΎΠ³ΠΎ элСк- тричСского поля, Ρ‡Ρ‚ΠΎ позволяСт Π·Π½Π°Ρ‡ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ ΠΏΠΎΠ²Ρ‹ΡΠΈΡ‚ΡŒ ΠΏΠΎΡ€ΠΎΠ³ пробоя срСды. ΠŸΡ€ΠΎΠ²Π΅Π΄Π΅Π½ΠΎ числСнноС ΠΌΠΎΠ΄Π΅Π»ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ процСсса ΠΎΡ€ΠΈΠ΅Π½Ρ‚Π°Ρ†ΠΈΠΈ ΠΌΠΎΠ»Π΅ΠΊΡƒΠ» Π²ΠΎ внСшнСм ΠΏΠΎΠ»Π΅ с ΡƒΡ‡Π΅Ρ‚ΠΎΠΌ ΠΏΠ΅Ρ€Π΅Ρ…ΠΎΠ΄ΠΎΠ² ΠΌΠ΅ΠΆΠ΄Ρƒ энСргС- тичСскими уровнями ΠΈ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, Ρ‡Ρ‚ΠΎ условия бСзынвСрсного усилСния ΠΌΠΎΠ³ΡƒΡ‚ Π±Ρ‹Ρ‚ΡŒ Ρ€Π΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Π½

    УсилСниС свСта сСлСктивно ΠΏΠΎ состояниям ΠΎΡ€ΠΈΠ΅Π½Ρ‚ΠΈΡ€ΠΎΠ²Π°Π½Π½Ρ‹ΠΌΠΈ ΠΌΠΎΠ»Π΅ΠΊΡƒΠ»Π°ΠΌΠΈ Π² ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ½ΠΎΠΌ элСктричСском ΠΏΠΎΠ»Π΅

    No full text
    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 implementedАнализируСтся Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ бСзынвСрсного усилСния свСта Π΄ΠΈΡ…Ρ€ΠΎΠΈΡ‡Π½Ρ‹ΠΌΠΈ ΠΌΠΎΠ»Π΅ΠΊΡƒΠ»Π°ΠΌΠΈ, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ ΠΌΠΎΠ³ΡƒΡ‚ Π±Ρ‹Ρ‚ΡŒ ΠΎΡ€ΠΈΠ΅Π½Ρ‚ΠΈΡ€ΠΎΠ²Π°Π½Ρ‹ сСлСктивно ΠΏΠΎ состояниям ΠΏΡƒΡ‚Π΅ΠΌ налоТСния ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ½ΠΎΠ³ΠΎ элСк- тричСского поля, Ρ‡Ρ‚ΠΎ позволяСт Π·Π½Π°Ρ‡ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ ΠΏΠΎΠ²Ρ‹ΡΠΈΡ‚ΡŒ ΠΏΠΎΡ€ΠΎΠ³ пробоя срСды. ΠŸΡ€ΠΎΠ²Π΅Π΄Π΅Π½ΠΎ числСнноС ΠΌΠΎΠ΄Π΅Π»ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ процСсса ΠΎΡ€ΠΈΠ΅Π½Ρ‚Π°Ρ†ΠΈΠΈ ΠΌΠΎΠ»Π΅ΠΊΡƒΠ» Π²ΠΎ внСшнСм ΠΏΠΎΠ»Π΅ с ΡƒΡ‡Π΅Ρ‚ΠΎΠΌ ΠΏΠ΅Ρ€Π΅Ρ…ΠΎΠ΄ΠΎΠ² ΠΌΠ΅ΠΆΠ΄Ρƒ энСргС- тичСскими уровнями ΠΈ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, Ρ‡Ρ‚ΠΎ условия бСзынвСрсного усилСния ΠΌΠΎΠ³ΡƒΡ‚ Π±Ρ‹Ρ‚ΡŒ Ρ€Π΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Π½

    Π€ΠΎΡ‚ΠΎΡΡ‚Π°Π±ΠΈΠ»ΡŒΠ½ΠΎΡΡ‚ΡŒ ΠΊΠΎΠ»Π»ΠΎΠΈΠ΄Π½Ρ‹Ρ… ΠΊΠ²Π°Π½Ρ‚ΠΎΠ²Ρ‹Ρ… Ρ‚ΠΎΡ‡Π΅ΠΊ CdTe ΠΈ Π³Ρ€Π°Ρ„Π΅Π½ΠΎΠ²Ρ‹Ρ… ΠΊΠ²Π°Π½Ρ‚ΠΎΠ²Ρ‹Ρ… Ρ‚ΠΎΡ‡Π΅ΠΊ ΠΏΡ€ΠΈ ΠΈΡ… ΠΎΠ±Π»ΡƒΡ‡Π΅Π½ΠΈΠΈ Π½Π΅ΠΏΡ€Π΅Ρ€Ρ‹Π²Π½Ρ‹ΠΌ ΠΈΠ·Π»ΡƒΡ‡Π΅Π½ΠΈΠ΅ΠΌ Π² Π²ΠΈΠ΄ΠΈΠΌΠΎΠΌ ΠΈ Π£Π€-Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π°Ρ…

    No full text
    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’ послСднСС дСсятилСтиС ΡƒΠ»ΡŒΡ‚Ρ€Π°Ρ„ΠΈΠΎΠ»Π΅Ρ‚ΠΎΠ²Ρ‹Π΅ Π΄Π΅Ρ‚Π΅ΠΊΡ‚ΠΎΡ€Ρ‹ ΠΏΡ€ΠΈΠ²Π»Π΅ΠΊΠ»ΠΈ Π·Π½Π°Ρ‡ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΠ΅ Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ ΠΈΠ·-Π·Π° ΠΈΡ… ΡˆΠΈΡ€ΠΎΠΊΠΎΠ³ΠΎ примСнСния Π² граТданской ΠΈ Π²ΠΎΠ΅Π½Π½ΠΎΠΉ областях. Π’ настоящСй Ρ€Π°Π±ΠΎΡ‚Π΅ исслСдовано влияниС излучСния Ρ€Π°Π·Π½Ρ‹Ρ… Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½ΠΎΠ² (Π£Π€- ΠΈ Π²ΠΈΠ΄ΠΈΠΌΠΎΠ³ΠΎ) Π½Π° ΡΠΏΠ΅ΠΊΡ‚Ρ€Π°Π»ΡŒΠ½Ρ‹Π΅ свойства ΠΊΠ²Π°Π½Ρ‚ΠΎΠ²Ρ‹Ρ… Ρ‚ΠΎΡ‡Π΅ΠΊ CdTe ΠΈ ΡˆΠΈΡ€ΠΎΠΊΠΎΠ·ΠΎΠ½Π½Ρ‹Ρ… Π³Ρ€Π°Ρ„Π΅Π½ΠΎΠ²Ρ‹Ρ… КВ. ΠŸΠΎΠ»ΡƒΡ‡Π΅Π½Π½Ρ‹Π΅ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ ΠΌΠΎΠ³ΡƒΡ‚ Π±Ρ‹Ρ‚ΡŒ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Π½Ρ‹ для создания ΠΈΠ½Ρ‚Π΅Π³Ρ€Π°Π»ΡŒΠ½ΠΎΠ³ΠΎ Π΄Π΅Ρ‚Π΅ΠΊΡ‚ΠΎΡ€Π° Π£Π€-излучСния Π½Π° Π½ΠΎΠ²Ρ‹Ρ… физичСских ΠΏΡ€ΠΈΠ½Ρ†ΠΈΠΏΠ°
    corecore