학술논문

Ultrafast Semiconducting to Metallic Terahertz Responses in the Topological Insulator Bi2Se3
Document Type
Conference
Source
2018 Conference on Lasers and Electro-Optics (CLEO) Lasers and Electro-Optics (CLEO), 2018 Conference on. :1-2 May, 2018
Subject
General Topics for Engineers
Photonics and Electrooptics
Topological insulators
Surface states
Molecular beam epitaxial growth
Buffer layers
Transient analysis
Spectroscopy
Language
Abstract
We present the photoinduced terahertz responses of topological insulators Bi2Se3. The photoconductance sign is determined by the competition between the topological surface state and the bulk response in n-type, p-type and bulk-insulating Bi 2 Se 3 .