TY - JOUR
T1 - Large birefringence and linear dichroism in TiS3 nanosheets
AU - Papadopoulos, Nikos
AU - Frisenda, Riccardo
AU - Biele, Robert
AU - Flores, Eduardo
AU - Ares, Jose R.
AU - Sánchez, Carlos
AU - Van Der Zant, Herre S.J.
AU - Ferrer, Isabel J.
AU - D'Agosta, Roberto
AU - Castellanos-Gomez, Andres
N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
PY - 2018
Y1 - 2018
N2 - TiS3 nanosheets have proven to be promising candidates for ultrathin optoelectronic devices due to their direct narrow band-gap and the strong light-matter interaction. In addition, the marked in-plane anisotropy of TiS3 is appealing for the fabrication of polarization sensitive optoelectronic devices. Herein, we study the optical contrast of TiS3 nanosheets of variable thickness on SiO2/Si substrates, from which we obtain the complex refractive index in the visible spectrum. We find that TiS3 exhibits very large birefringence, larger than that of well-known strong birefringent materials like TiO2 or calcite, and linear dichroism. These findings are in qualitative agreement with ab initio calculations that suggest an excitonic origin for the birefringence and linear dichroism of the material.
AB - TiS3 nanosheets have proven to be promising candidates for ultrathin optoelectronic devices due to their direct narrow band-gap and the strong light-matter interaction. In addition, the marked in-plane anisotropy of TiS3 is appealing for the fabrication of polarization sensitive optoelectronic devices. Herein, we study the optical contrast of TiS3 nanosheets of variable thickness on SiO2/Si substrates, from which we obtain the complex refractive index in the visible spectrum. We find that TiS3 exhibits very large birefringence, larger than that of well-known strong birefringent materials like TiO2 or calcite, and linear dichroism. These findings are in qualitative agreement with ab initio calculations that suggest an excitonic origin for the birefringence and linear dichroism of the material.
UR - http://resolver.tudelft.nl/uuid:05ab399f-4568-418d-9552-e1a077e666e4
UR - http://www.scopus.com/inward/record.url?scp=85049853983&partnerID=8YFLogxK
U2 - 10.1039/c8nr03616k
DO - 10.1039/c8nr03616k
M3 - Article
AN - SCOPUS:85049853983
SN - 2040-3364
VL - 10
SP - 12424
EP - 12429
JO - Nanoscale
JF - Nanoscale
IS - 26
ER -