Date:
Wed, 26/12/201815:00-16:00
Location:
Danciger B Building, Seminar room
Lecturer: Moshe Harats, Fachbereich Physik, Freie Universität Berlin, Germany
Abstract:
2D materials have attracted a lot of attention from the research community for their unique physical properties. One of their most celebrated features is their stiffness as well as their breaking strength. As an example, Graphene is one of the strongest materials in the world with a Young’s modulus of 1TPa. A special class of 2D materials, transition metals dichalcogenides (TMDC) is optically active and hosts excitons even at room temperature. As all TMDC can be deformed easily as any other 2D material, it is crucial to understand the role of strain on their optical properties. In this talk I will present the different approaches in the field of mechanics of 2D materials and how to approach the elastic deformations of 2D materials from the optics side. I will show how by engineering a local strain profile in 2D materials we can achieve two different phenomena – funneling of excitons in WS2¬ and creation and annihilation of narrow line emitters in hBN.
Abstract:
2D materials have attracted a lot of attention from the research community for their unique physical properties. One of their most celebrated features is their stiffness as well as their breaking strength. As an example, Graphene is one of the strongest materials in the world with a Young’s modulus of 1TPa. A special class of 2D materials, transition metals dichalcogenides (TMDC) is optically active and hosts excitons even at room temperature. As all TMDC can be deformed easily as any other 2D material, it is crucial to understand the role of strain on their optical properties. In this talk I will present the different approaches in the field of mechanics of 2D materials and how to approach the elastic deformations of 2D materials from the optics side. I will show how by engineering a local strain profile in 2D materials we can achieve two different phenomena – funneling of excitons in WS2¬ and creation and annihilation of narrow line emitters in hBN.