A5044169029- Quantum Dots Synthesis And Properties
- Quantum optics and atomic interactions
- Spectroscopy and Quantum Chemical Studies
- Photonic Crystals and Applications
- Near-Field Optical Microscopy
- Liquid Crystal Research Advancements
- Spectroscopy Techniques in Biomedical and Chemical Research
- Photochemistry and Electron Transfer Studies
- Chalcogenide Semiconductor Thin Films
- Advanced Fluorescence Microscopy Techniques
- Nonlinear Optical Materials Studies
- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Spectroscopy and Laser Applications
- Photoacoustic and Ultrasonic Imaging
- Photorefractive and Nonlinear Optics
- Laser-Ablation Synthesis of Nanoparticles
- Semiconductor Quantum Structures and Devices
- Infrared Thermography in Medicine
- Thermoregulation and physiological responses
- Laser-Matter Interactions and Applications
- Optical and Acousto-Optic Technologies
- Laser Design and Applications
- Luminescence Properties of Advanced Materials
- Random lasers and scattering media
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2022-2025
Moscow State Pedagogical University
2014-2023
Institute of Spectroscopy
2013-2023
Russian Academy of Sciences
2008-2022
Kazan E. K. Zavoisky Physical-Technical Institute
2007-2015
Kazan Federal University
2006-2009
Low-temperature dynamics in layered ensembles of core-double-shell colloidal CdSe/CdS/ZnS quantum dots is studied using different experimental techniques, including photoluminescence and absorption spectroscopy, luminescence microscopy, photon echo, transmission electronic microscopy Raman scattering. A combination techniques clarify the nature hierarchy relaxation processes dot (QD)-composite under study for a broad range temperatures timescales. The parameters local phonons QDs was found...
Полупроводниковые нанокристаллы (квантовые точки, КТ) обладают уникальными фотофизическими свойствами, что открывает широкие возможности их прикладного использования в методах и инструментах современной фотоники. В данной статье рассматриваются возможные приложения КТ. Обсуждаются как существующие устройства, так перспективы разработки новых методов приборов Рассмотрены инновационные подходы применения КТ различных областях современных фотонных технологий: оптоэлектронике, биофизике,...
The photon echo (PE) spectroscopy and single-molecule (SMS) may be combined to give a very powerful tool for comprehensive study of low-temperature dynamics in dye-doped disordered solids (polymers, glasses). At the same time, this type studies are likely reveal discrepancies when comparing characteristic times optical dephasing T2 zero-phonon spectral lines (ZPL) broadening obtained from PE SMS, correspondingly, tetra-tert-butylterrylene polyisobutylene temperature range few–dozen Kelvins...
Luminescence imaging has been adapted to facilitate alignment and focusing of multiple non-collinear laser beams in pump–probe experiments. The technique validated an experiment on four-wave mixing a doped polymer placed into high-pressure sapphire-anvil cell, itself inside optical cryostat.
В статье приведен краткий обзор работ, посвященных синтезу, исследованию фотофизических и спектральных свойств анализу применений полупроводниковых нанокристаллов – квантовых точек (КТ). Обсуждаются фундаментальные закономерности, связывающие морфологию КТ с их оптико-спектральными характеристиками, а также некоторые теоретические модели, позволяющие описать различные эффекты процессы: квантово-размерный эффект, электрон-фононное взаимодействие, локального поля, мерцание...
The results of an experimental investigation the incoherent photon echo in ruby (with Cr 3+ concentration equal to 0.16 wt%) at T =1.7 K are presented. Optical fiber with length 3 m and diameter 100 μm was used for delivery first exciting pulse a sample. dependence IPE intensity on excitation wavelength within width R 1 absorption line studied. decay curve obtained phase relaxation time found be 98 ns.
Two-pulse, stimulated and accumulated photon echoes are investigated for the first time in a highly doped crystal Tm:YAG containing 10 at.% Tm3+. The decay curves of two-pulse generated at 793.15 nm on transition 3H6(1)–3H4(1) impurity ions measured absence an applied magnetic field parameters describing energy phase relaxation determined. dependence intensity echo number excitation pulse pairs is investigated.
Quantum confinement effect and its influence on absorption photoluminescence spectra of CdSe nanoparticles chemically synthesized in thermotropic ionic liquid crystal cadmium octanoate are studied. It was found out that the spectral resolution grows with decrease temperature, so it becomes possible to distinguish band-edge luminescence from bands associated presence surface defects. Obtained were analyzed theoretically energy diagrams for samples 1.8 nm 2.6 calculated.
Simple procedure to prepare samples containing semiconductor quantum dots was developed. Test photon echo measurements in the ensemble of spread on a glass substrate were performed study optical dephasing processes.
The structural characteristics of polymer track-etched membranes (TM) were obtained by atomic force microscopy (AFM) for a set samples (polypropylene, polycarbonate, polyethylene terephthalate, with average pore diameters ~183, 375, and 1430 nm, respectively). analysis AFM experimental data was performed using specially developed technique computer images. method allows one to obtain such parameters TM as distribution diameters, the minimum distances between nearest pores, surface density,...
A theoretical model is proposed for describing the interaction of excitons with phonons and defect states in semiconductor nanocrystals. On basis this model, numerical simulation was performed experimental data on temperature dependence absorption fluorescence spectra cadmium selenide quantum dots liquid crystal solid solutions caprylate discussed.
In this paper we develop an approach based on the dynamic theory of optical coherent transients in solids that allows one to describe processes ultrafast dephasing observed photon echo spectroscopy disordered solid-state media. The was tested by modeling non-exponential decay curves measured experiments femtosecond and incoherent echo.