Wavelength-controlled manipulation of colloidal quasi-resonant quantum dots under pulsed laser irradiation


Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: Conference on Nanophotonics and Micro/Nano Optics III; Beijing, PEOPLES R CHINA; Beijing, PEOPLES R CHINA

Год издания: 2016

Идентификатор DOI: 10.1117/12.2245386

Ключевые слова: Self-assembly, nanostructures, quantum dots, absorption spectra, dipole-dipole interaction, laser control, Electrodynamics, Electromagnetic wave absorption, Irradiation, Nanocrystals, Nanophotonics, Quantum dot lasers, Self assembly, Semiconductor lasers, Semiconductor quantum dots, Colloid solutions, Controlled manipulations, Dipole dipole interactions, Excitonic resonance, Irradiation wavelength, Semiconductor nanoparticles, Theoretical approach, Pulsed lasers

Аннотация: Production of nanostructures consisting of semiconductor nanoparticles (NPs) is of interest for number of applications. Development of new methods of NPs' manipulation and aggregation of NPs into nanostructures with pre-defined geometry is also of considerable interest from the fundamental point of view. Under laser irradiation witПоказать полностьюh properly chosen wavelengths excitonic excitations of semiconductor NPs will be induced. Electrodynamical interaction between excited NPs is rather universal and allows formation of wide variety of nanostructures both of homo-and heterogeneous content. Theoretical approach for study of interaction of NPs' ensembles with laser light includes dipole-dipole approximation for NPs' attraction. Experimental results are obtained for TGA stabilized CdTe QDs with the excitonic resonance at 520 nm. Six different samples of the same colloid solution were irradiated at wavelengths from 540 to 570 nm. Modifications of absorption spectra of solutions after irradiation was detected, being most prominent at 555 and 560 nm irradiation wavelengths. Analysis of spectra shows that up to 47% of QDs were assembled into pairs with 10 nm inter-QD distance. Therefore, possibility of precise QDs manipulation via laser-induced electrodynamical interaction is demonstrated.

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Выпуск журнала: Vol. 10027

Номера страниц: 1002711

ISSN журнала: 0277786X

Место издания: BELLINGHAM



  • Tsipotan Aleksei S. (Siberian Fed Univ, 79 Pr Svobodny, Krasnoyarsk 660041, Russia)
  • Aleksandrovsky Aleksandr S. (Siberian Fed Univ, 79 Pr Svobodny, Krasnoyarsk 660041, Russia; Russian Acad Sci, Kirensky Inst Phys, Akademgorodok 50,Bld 38, Krasnoyarsk 660036, Russia)
  • Slabko Vitaliy V. (Siberian Fed Univ, 79 Pr Svobodny, Krasnoyarsk 660041, Russia)