Influence of wetting layers and quantum dot size distribution on intermediate band formation in InAs/GaAs superlattices

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/98718/1/JApplPhys_110_073105.pd

Polarization Response in InAs Quantum Dots: Theoretical Correlation between Composition and Electronic Properties

III-V growth and surface conditions strongly influence the physical structure and resulting optical properties of self-assembled quantum dots (QDs). Beyond the design of a desired active optical wavelength, the polarization response of QDs is of particular interest for optical communications and quantum information science. Previous theoretical studies based on a pure InAs QD model failed to reproduce experimentally observed polarization properties. In this work, multi-million atom simulations are performed to understand the correlation between chemical composition and polarization properties of QDs. A systematic analysis of QD structural parameters leads us to propose a two layer composition model, mimicking In segregation and In-Ga intermixing effects. This model, consistent with mostly accepted compositional findings, allows to accurately fit the experimental PL spectra. The detailed study of QD morphology parameters presented here serves as a tool for using growth dynamics to engineer the strain field inside and around the QD structures, allowing tuning of the polarization response.Comment: 8 pages, 6 figures; accepted for publication in IOP Nanotechnology journa

Influence of Mn dopants on InAs/GaAs quantum dot electronic states

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/98664/1/ApplPhysLett_98_141907.pd

Russian Old Believer of Amerika as an Example of Modern Traditionalism

Статья поступила в редакцию 07.06.2016 г.В статье анализируется старообрядчество как одно из ярчайших явлений русской традиционной культуры. Актуальность темы современного старообрядчества — в выяснении возможностей адаптации традиционной русской культуры и менталитета к современным светским условиям. Сегодняшние старообрядцы Аляски являют собой пример приспособления традиционных духовных принципов к условиям пребывания в центре мировой глобализации, вестернизации, научно-технического прогресса и постиндустриализма. Авторы исследования в 2015 г. участвовали в экспедиции к русским старообрядцам Аляски, задача которой заключалась в комплексном исследовании мировоззрения, менталитета, образа жизни аляскинских старообрядцев. Обзор итогов и выводов этой экспедиции приводится в данной статье.Russian Old Believers is one of the most striking phenomenon of the Russian traditional culture, and in this respect is the subject of numerous studies. Today the Old Believers in Alaska represent an example of adaptation of traditional spiritual principles to the life style in the centre of the world globalization, westernization, scientific and technological progress and post-industrialism. The authors of this study have been on an expedition to the Old Believers in Alaska and studied their worldview, mentality and way of life. The results of this trip are presented in the following article.Исследование выполнено при поддержке Российского гуманитарного научного фонда, проект № 15-03-18037-е «Русские старообрядцы в Северной Америке: национальная идентичность в эпоху глобализации»