Retranslation of Luminescence Excitation during Cascade Transitions in Hybrid Nanostructures Based on InP/InAsP/InP NWs and CdSe/ZnS-TOPO QDs

IF 0.8 4区物理与天体物理 Q4 OPTICS

Optics and Spectroscopy Pub Date : 2024-09-11 DOI:10.1134/S0030400X24040106

A. I. Khrebtov, A. S. Kulagina, N. V. Sibirev, A. N. Yablonskiy, A. S. Ruban, R. R. Reznik, G. E. Cirlin, V. V. Danilov

{"title":"Retranslation of Luminescence Excitation during Cascade Transitions in Hybrid Nanostructures Based on InP/InAsP/InP NWs and CdSe/ZnS-TOPO QDs","authors":"A. I. Khrebtov, A. S. Kulagina, N. V. Sibirev, A. N. Yablonskiy, A. S. Ruban, R. R. Reznik, G. E. Cirlin, V. V. Danilov","doi":"10.1134/S0030400X24040106","DOIUrl":null,"url":null,"abstract":"<p>The features of photoluminescence (PL) of hybrid nanostructures based on InP/InAsP/InP nanowires array with deposited colloidal CdSe/ZnS-trioctylphosphine oxide quantum dots at increasing pump power have been studied. Pumping was carried out by 10 ps laser pulses duration with 1 MHz repetition rate at 532 nm wavelength in the quasi-resonant region of QDs absorption. It has been established, that PL maximum of the nanostructure shifts hypsochromically with increasing of laser power, revealing a gradual dominance of the bands of its components. This PL manifestation is explained by the cascade filling of excited excitonic states, accompanied by the Auger recombination processes and light quenching. The role of free carriers absorption and energy exchange between excitonic states at high pump intensities is noted, as well as a sharp PL duration reduction associated with an increase of stimulated processes in absorption.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"132 4","pages":"378 - 386"},"PeriodicalIF":0.8000,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics and Spectroscopy","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S0030400X24040106","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"OPTICS","Score":null,"Total":0}

引用次数: 0

Abstract

The features of photoluminescence (PL) of hybrid nanostructures based on InP/InAsP/InP nanowires array with deposited colloidal CdSe/ZnS-trioctylphosphine oxide quantum dots at increasing pump power have been studied. Pumping was carried out by 10 ps laser pulses duration with 1 MHz repetition rate at 532 nm wavelength in the quasi-resonant region of QDs absorption. It has been established, that PL maximum of the nanostructure shifts hypsochromically with increasing of laser power, revealing a gradual dominance of the bands of its components. This PL manifestation is explained by the cascade filling of excited excitonic states, accompanied by the Auger recombination processes and light quenching. The role of free carriers absorption and energy exchange between excitonic states at high pump intensities is noted, as well as a sharp PL duration reduction associated with an increase of stimulated processes in absorption.

Abstract Image

查看原文本刊更多论文

基于 InP/InAsP/InP NW 和 CdSe/ZnS-TOPO QD 的混合纳米结构级联转换过程中的发光激发再转换

摘要研究了基于 InP/InAsP/InP 纳米线阵列和沉积胶体 CdSe/ZnS 三辛基氧化膦量子点的混合纳米结构在增加泵浦功率时的光致发光（PL）特性。在量子点吸收的准共振区，用持续时间为 10 ps、重复频率为 1 MHz、波长为 532 nm 的激光脉冲进行泵浦。实验结果表明，随着激光功率的增加，纳米结构的聚光最大值会发生低色移，显示出其成分的波段逐渐占据主导地位。激发的激子态的级联填充以及伴随的欧杰重组过程和光淬灭可以解释这种光致发光现象。在高泵浦强度下，自由载流子的吸收和激子态之间的能量交换起着重要作用，同时聚光持续时间的急剧缩短与吸收中受激过程的增加有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Optics and Spectroscopy 物理-光谱学

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Optics and Spectroscopy (Optika i spektroskopiya), founded in 1956, presents original and review papers in various fields of modern optics and spectroscopy in the entire wavelength range from radio waves to X-rays. Topics covered include problems of theoretical and experimental spectroscopy of atoms, molecules, and condensed state, lasers and the interaction of laser radiation with matter, physical and geometrical optics, holography, and physical principles of optical instrument making.