Laser-induced self-assembly of quantum dots: Deterministic case versus brownian case : научное издание

Описание

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1016/j.photonics.2020.100791

Ключевые слова: Brownian dynamics, Dipole-dipole interaction, Laser field, Self-assembly of nanostructures, Brownian movement, Laser radiation, Nanocrystals, Self assembly, Semiconductor quantum dots, Attraction force, Colloidal quantum dots, Directional diffusion, Initial orientation, Interparticle distances, Laser wavelength, Polarization planes, Resonant increase, Quantum dot lasers

Аннотация: The process of aggregation of two colloidal quantum dots in the field of quasiresonant laser radiation is investigated via computer simulation. The cases of either completely deterministic movement of particles or the movement with the account for random forces are considered. The conditions of pair formation are determined in depeПоказать полностьюndence on initial interparticle distance, on laser wavelength, and on their initial orientation with respect to polarization plane of laser radiation. It is shown that despite velocity of thermal motion dominates over the velocity of directional diffusion of quantum dots, the account for random forces weakly influences on the probability of pair formation, the latter being close to results obtained in the deterministic case. The reason for this weak influence of Brownian movement is the resonant increase of electrodynamics attraction force during certain time interval within the laser pulse The process of aggregation of two colloidal quantum dots in the field of quasiresonant laser radiation is investigated via computer simulation. The cases of either completely deterministic movement of particles or the movement with the account for random forces are considered. The conditions of pair formation are determined in dependence on initial interparticle distance, on laser wavelength, and on their initial orientation with respect to polarization plane of laser radiation. It is shown that despite velocity of thermal motion dominates over the velocity of directional diffusion of quantum dots, the account for random forces weakly influences on the probability of pair formation, the latter being close to results obtained in the deterministic case. The reason for this weak influence of Brownian movement is the resonant increase of electrodynamics attraction force during certain time interval within the laser pulse.

Ссылки на полный текст

Издание

Журнал: Photonics and Nanostructures - Fundamentals and Applications

Выпуск журнала: Vol. 40

Номера страниц: 100791

ISSN журнала: 15694410

Издатель: Elsevier B.V.

Авторы

  • Tsipotan A.S. (Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodny prospect, Krasnoyarsk, 660041, Russian Federation)
  • Tkachenko V.A. (Polytechnic Institute, Siberian Federal University, 79 Svobodny prospect, Krasnoyarsk, 660041, Russian Federation)
  • Aleksandrovsky A.S. (Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodny prospect, Krasnoyarsk, 660041, Russian Federation, Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Akademgorodok 50 bld.38, Krasnoyarsk, 660036, Russian Federation)
  • Slabko V.V. (Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodny prospect, Krasnoyarsk, 660041, Russian Federation)