usdtチェーンタイプ

本文へ toggle navigation About CCS column1 Message from the Director Mission Chronology Organization column2 Scientists Honorary Fellowship Faculty and Research Fellow Division of Particle Physics Division of Astrophysics Division of Nuclear Physics Division of Quantum Condensed Matter Physics Division of Life Sciences Division of Global Environmental Science Division of High Performance Computing Systems Division of Computational Informatics Collaborative Fellow (Other Organization) column3 Careers Findings Research Papers and Conference Presentations Research Papers and Conference Presentations FY2009 External Review External Review (2008-2013) External Review(2007) SC Exhibit Posters Research Activities column1 Project Office for Exascale Computational Sciences Project Office for Exascale Computing System Research and Development Project Office for HPCI Strategic Program Project Office for AI & Big Data Promotion Office for Computational Sciences Project Office for High Performance Computing System Development and Management Liaison Office for Multidisciplinary Computational Sciences Project Office for Society-Academia collaboration in computational sciences Bureau of Public Relations and Strategy Department of Computational Medical Science Research Divisions column1 Division of Particle Physics Division of Astrophysics Division of Nuclear Physics Division of Quantum Condensed Matter Physics Division of Life Sciences Biological Function and Information Group Molecular Evolution Group column2 Division of Global Environmental Science Division of High Performance Computing Systems Division of Computational Informatics Database Group Computational Media Group Projects column1 Joint Center for Advanced High Performance Computing (JCAHPC) column2 Published Codes Databases column3 Past Projects Supercomputers Open Seminars column1 Symposium Colloquium Workshop Use Computers column1 Multidisciplinary Cooperative Research Program (MCRP) MCRP application Guideline for acknowledgement MCRP: Procedure after adoption Public Relations column1 Press Releases Brochure Logo Mark Gallery Contact Japanese Contact Careers RSS Traffic access font size: medium large About CCS column1 Message from the Director Mission Chronology Organization column2 Scientists Honorary Fellowship Faculty and Research Fellow Division of Particle Physics Division of Astrophysics Division of Nuclear Physics Division of Quantum Condensed Matter Physics Division of Life Sciences Division of Global Environmental Science Division of High Performance Computing Systems Division of Computational Informatics Collaborative Fellow (Other Organization) column3 Careers Findings Research Papers and Conference Presentations Research Papers and Conference Presentations FY2009 External Review External Review (2008-2013) External Review(2007) SC Exhibit Posters Research Activities column1 Project Office for Exascale Computational Sciences Project Office for Exascale Computing System Research and Development Project Office for HPCI Strategic Program Project Office for AI & Big Data Promotion Office for Computational Sciences Project Office for High Performance Computing System Development and Management Liaison Office for Multidisciplinary Computational Sciences Project Office for Society-Academia collaboration in computational sciences Bureau of Public Relations and Strategy Department of Computational Medical Science Research Divisions column1 Division of Particle Physics Division of Astrophysics Division of Nuclear Physics Division of Quantum Condensed Matter Physics Division of Life Sciences Biological Function and Information Group Molecular Evolution Group column2 Division of Global Environmental Science Division of High Performance Computing Systems Division of Computational Informatics Database Group Computational Media Group Projects column1 Joint Center for Advanced High Performance Computing (JCAHPC) column2 Published Codes Databases column3 Past Projects Supercomputers Open Seminars column1 Symposium Colloquium Workshop Use Computers column1 Multidisciplinary Cooperative Research Program (MCRP) MCRP application Guideline for acknowledgement MCRP: Procedure after adoption Public Relations column1 Press Releases Brochure Logo Mark Gallery Contact Press Release English Top トップページ Press Release Getting Excited About Excitons Press Release Getting Excited About Excitons An international research team involving a researcher at Tsukuba University uses attosecond laser pulses to study electronic excitations in a dielectric crystal, which may open the way for novel computer logical elements and optical devices Light-induced ultrafast exciton dynamics in MgF2 were investigated with attosecond transient reflection spectroscopy and microscopic theoretical simulations. © Matteo Lucchini, Politecnico di Milano    The international research team has analyzed the ultrafast electronic response inside magnesium fluoride (MgF2) crystals caused by very short laser bursts. They found that the electron behavior at attosecond timescales was similar to that seen in both atoms and solids. This work may lead to better control of the electronic activity in previously overlooked materials. In the past decade, light-induced ultrafast electron dynamics in solids in the femtosecond (10-15 second) and the attosecond (10-18 second) regimes have been intensively studied towards the realization of future ultrafast electronics, optics, and optoelectronics. However, the fundamental understanding of many-body effects, which emerge from the interaction of many particles, in such ultrafast electron dynamics has been missing due to their complexity. The emergence of excitons is a typical case of these many-body effects, which are among the most important quasi-particles in solids from both fundamental and technological points of view. Therefore, the development of a microscopic understanding of ultrafast exciton dynamics is an important milestone towards the science of nonequilibrium electron dynamics. Now, a research team involving a researcher at Tsukuba University has used attosecond transient reflection spectroscopy to study core-level excitons in magnesium fluoride crystals. “Thanks to the utilization of independent calibration experiments, we were able to achieve results that matched with theoretical simulations,” says author Professor Shunsuke Sato. An important finding was that the exciton acted like a hybrid between an electron orbiting a single atom, and an electron delocalized over a bulk material. The researchers propose methods such as adding an external electric field or mechanical strain to the crystal to precisely control this response.  “Exploring solutions beyond classical electronics, is becoming increasingly important if we want to move beyond current technological computing limits,” Professor Sato says. “The results of our research may lead to new materials for performing computations faster and more efficiently than current systems.” Original Paper The work is published in Advanced Functional Materials as &＃8220;Unravelling the intertwined atomic and bulk nature of localised excitons by attosecond spectroscopy&＃8221; (DOI:10.1038/s41467-021-21345-7). Correspondence Assistant Professor SATO ShunsukeCenter for Computational Sciences, University of Tsukuba Facebook で共有するにはクリックしてください (新しいウィンドウで開きます)クリックして Twitter で共有 (新しいウィンドウで開きます)« Next Step in Simulating the UniverseA Super New Theory » About CCSFindings SC Exhibit Posters External Review External Review(2007) External Review (2008-2013) Parallel Tracks for Divisions External Review Photo Gallery Research Papers and Conference Presentations Research Papers and Conference Presentations FY2009 Scientists Collaborative Fellow (Other Organization) Faculty and Research Fellow Division of Computational Informatics Division of High Performance Computing Systems Division of Global Environmental Science Division of Life Sciences Division of Quantum Condensed Matter Physics Division of Nuclear Physics Division of Astrophysics Division of Particle Physics Honorary Fellowship Organization Chronology Mission Message from the Director Research DivisionsDivision of Computational Informatics Computational Media Group Database Group Division of High Performance Computing Systems Division of Global Environmental Science Division of Life Sciences Molecular Evolution Group Biological Function and Information Group Division of Quantum Condensed Matter Physics Division of Nuclear Physics Division of Astrophysics Division of Particle Physics Research ActivitiesDepartment of Computational Medical Science Bureau of Public Relations and Strategy Project Office for Society-Academia collaboration in computational sciences Liaison Office for Multidisciplinary Computational Sciences Project Office for High Performance Computing System Development and Management Promotion Office for Computational Sciences Project Office for HPCI Strategic Program Project Office for AI & Big Data Project Office for Exascale Computing System Research and Development Project Office for Exascale Computational Sciences ProjectsHA-PACS History of PACS/PAX Series Progress and Achievements HA-PACS Base Cluster Exascale Computing System Development Exascale Computational Sciences Organization of HA-PACS Project Project Objective Past Projects Joint Center for Advanced High Performance Computing (JCAHPC) Published Codes QCD (Quantum Chromo Dynamics) Databases Supercomputers Open SeminarsColloquium Workshop Symposium Use ComputersCCS security policy FAQ Guideline for acknowledgement MCRP: Procedure after adoption MCRP application Multidisciplinary Cooperative Research Program (MCRP) Public RelationsOld Web Site Contact Gallery Logo Mark Brochure Press Releases About this site Center for Computational Sciences, University of Tsukuba1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577 Japan +81-29-853-6487 （CCS Office） © 2016 Center for Computational Sciences, University of Tsukuba.