Large birefringence and linear dichroism in TiS3 nanosheets

被引：49

作者：

Papadopoulos, Nikos ^{[1
]}

Frisenda, Riccardo ^{[2
]}

Biele, Robert ^{[3
,4
,9
,10
]}

Flores, Eduardo ^{[5
]}

Ares, Jose R. ^{[5
,6
]}

Sanchez, Carlos ^{[5
,6
]}

van der Zant, Herre S. J. ^{[1
]}

Ferrer, Isabel J. ^{[5
,6
]}

D'Agosta, Roberto ^{[3
,4
,7
]}

Castellanos-Gomez, Andres ^{[8
]}

机构：

[1] Delft Univ Technol, Kavli Inst Nanosci, Lorentzweg 1, NL-2628 CJ Delft, Netherlands

[2] Inst Madrileno Estudios Avanzados Nanociencia IMD, Campus Cantoblanco, E-28049 Madrid, Spain

[3] Univ Pais Vasco UPV EHU, Nanobio Spect Grp, San Sebastian 20018, Spain

[4] Univ Pais Vasco UPV EHU, European Theoret Spect Facil ETSF, San Sebastian 20018, Spain

[5] Univ Autonoma Madrid, Dept Fis Mat, Mat Interest Renewable Energies Grp MIRE Grp, Campus Cantoblanco, E-28049 Madrid, Spain

[6] Univ Autonoma Madrid, Inst Nicolas Cabrera, Campus Cantoblanco, E-28049 Madrid, Spain

[7] Basque Fdn Sci, IKERBASQUE, Bilbao 48013, Spain

[8] Inst Ciencia Mat Madrid ICMM CSIC, Mat Sci Factory, Campus Cantoblanco, E-28049 Madrid, Spain

[9] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany

[10] Tech Univ Dresden, Max Bergmann Ctr Biomat, D-01062 Dresden, Germany

来源：

NANOSCALE | 2018年 / 10卷 / 26期

基金：

欧洲研究理事会;

关键词：

FEW-LAYER; ANISOTROPY; IDENTIFICATION; SEMICONDUCTOR; SPECTROSCOPY;

D O I：

10.1039/c8nr03616k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：12424 / 12429

页数：6

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