Optical properties of orthorhombic germanium sulfide: unveiling the anisotropic nature of Wannier excitons

Author:

Arfaoui Mehdi1ORCID,Zawadzka Natalia2,Ayari Sabrine3,Chen Zhaolong45,Watanabe Kenji6ORCID,Taniguchi Takashi7,Babiński Adam2,Koperski Maciej45,Jaziri Sihem1,Molas Maciej R.2ORCID

Affiliation:

1. Laboratoire de Physique de la Matière Condensée, Département de Physique, Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire, 1060 Tunis, Tunisia

2. Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland

3. Laboratoire de Physique de l'Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, 24 rue Lhomond, 75005 Paris, France

4. Institute for Functional Intelligent Material, National University of Singapore, 117575, Singapore

5. Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore

6. Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan

7. Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan

Abstract

Strong polarization-dependent effects on the optical response in the low-symmetry orthorhombic crystal structure of GeS and the emergence of mixed exciton states due to anisotropy-induced symmetry breaking.

Funder

Narodowym Centrum Nauki

Ministry of Education - Singapore

Air Force Office of Scientific Research

Japan Society for the Promotion of Science

Ministry of Education, Culture, Sports, Science and Technology

Publisher

Royal Society of Chemistry (RSC)

Subject

General Materials Science

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