Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator

Electrons with a linear energy/momentum dispersion are called massless Dirac electrons and represent the low-energy excitations in exotic materials such as graphene and topological insulators. Dirac electrons are characterized by notable properties such as a high mobility, a tunable density and, in...

Full description

Bibliographic Details
Main Authors:	Giorgianni, Flavio, Chiadroni, Enrica, Rovere, Andrea, Cestelli-Guidi, Mariangela, Perucchi, Andrea, Bellaveglia, Marco, Castellano, Michele, Di Giovenale, Domenico, Di Pirro, Giampiero, Ferrario, Massimo, Pompili, Riccardo, Vaccarezza, Cristina, Villa, Fabio, Cianchi, Alessandro, Mostacci, Andrea, Petrarca, Massimo, Brahlek, Matthew, Koirala, Nikesh, Oh, Seongshik, Lupi, Stefano
Format:	Online
Language:	English
Published:	Nature Publishing Group 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4853424/

id	pubmed-4853424
recordtype	oai_dc
spelling	pubmed-48534242016-05-10 Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator Giorgianni, Flavio Chiadroni, Enrica Rovere, Andrea Cestelli-Guidi, Mariangela Perucchi, Andrea Bellaveglia, Marco Castellano, Michele Di Giovenale, Domenico Di Pirro, Giampiero Ferrario, Massimo Pompili, Riccardo Vaccarezza, Cristina Villa, Fabio Cianchi, Alessandro Mostacci, Andrea Petrarca, Massimo Brahlek, Matthew Koirala, Nikesh Oh, Seongshik Lupi, Stefano Article Electrons with a linear energy/momentum dispersion are called massless Dirac electrons and represent the low-energy excitations in exotic materials such as graphene and topological insulators. Dirac electrons are characterized by notable properties such as a high mobility, a tunable density and, in topological insulators, a protection against backscattering through the spin–momentum locking mechanism. All those properties make graphene and topological insulators appealing for plasmonics applications. However, Dirac electrons are expected to present also a strong nonlinear optical behaviour. This should mirror in phenomena such as electromagnetic-induced transparency and harmonic generation. Here we demonstrate that in Bi2Se3 topological insulator, an electromagnetic-induced transparency is achieved under the application of a strong terahertz electric field. This effect, concomitantly determined by harmonic generation and charge-mobility reduction, is exclusively related to the presence of Dirac electron at the surface of Bi2Se3, and opens the road towards tunable terahertz nonlinear optical devices based on topological insulator materials. Nature Publishing Group 2016-04-26 /pmc/articles/PMC4853424/ /pubmed/27113395 http://dx.doi.org/10.1038/ncomms11421 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Giorgianni, Flavio Chiadroni, Enrica Rovere, Andrea Cestelli-Guidi, Mariangela Perucchi, Andrea Bellaveglia, Marco Castellano, Michele Di Giovenale, Domenico Di Pirro, Giampiero Ferrario, Massimo Pompili, Riccardo Vaccarezza, Cristina Villa, Fabio Cianchi, Alessandro Mostacci, Andrea Petrarca, Massimo Brahlek, Matthew Koirala, Nikesh Oh, Seongshik Lupi, Stefano
spellingShingle	Giorgianni, Flavio Chiadroni, Enrica Rovere, Andrea Cestelli-Guidi, Mariangela Perucchi, Andrea Bellaveglia, Marco Castellano, Michele Di Giovenale, Domenico Di Pirro, Giampiero Ferrario, Massimo Pompili, Riccardo Vaccarezza, Cristina Villa, Fabio Cianchi, Alessandro Mostacci, Andrea Petrarca, Massimo Brahlek, Matthew Koirala, Nikesh Oh, Seongshik Lupi, Stefano Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator
author_facet	Giorgianni, Flavio Chiadroni, Enrica Rovere, Andrea Cestelli-Guidi, Mariangela Perucchi, Andrea Bellaveglia, Marco Castellano, Michele Di Giovenale, Domenico Di Pirro, Giampiero Ferrario, Massimo Pompili, Riccardo Vaccarezza, Cristina Villa, Fabio Cianchi, Alessandro Mostacci, Andrea Petrarca, Massimo Brahlek, Matthew Koirala, Nikesh Oh, Seongshik Lupi, Stefano
author_sort	Giorgianni, Flavio
title	Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator
title_short	Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator
title_full	Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator
title_fullStr	Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator
title_full_unstemmed	Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator
title_sort	strong nonlinear terahertz response induced by dirac surface states in bi2se3 topological insulator
description	Electrons with a linear energy/momentum dispersion are called massless Dirac electrons and represent the low-energy excitations in exotic materials such as graphene and topological insulators. Dirac electrons are characterized by notable properties such as a high mobility, a tunable density and, in topological insulators, a protection against backscattering through the spin–momentum locking mechanism. All those properties make graphene and topological insulators appealing for plasmonics applications. However, Dirac electrons are expected to present also a strong nonlinear optical behaviour. This should mirror in phenomena such as electromagnetic-induced transparency and harmonic generation. Here we demonstrate that in Bi2Se3 topological insulator, an electromagnetic-induced transparency is achieved under the application of a strong terahertz electric field. This effect, concomitantly determined by harmonic generation and charge-mobility reduction, is exclusively related to the presence of Dirac electron at the surface of Bi2Se3, and opens the road towards tunable terahertz nonlinear optical devices based on topological insulator materials.
publisher	Nature Publishing Group
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4853424/
_version_	1613574164245905408

Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator

Similar Items