Ultrafast Semiconducting to Metallic Terahertz Responses in the Topological Insulator Bi2Se3

Authors :: Aloysius Soon
Hojin Lee
Soonyoung Cha
Jisoo Moon
Ho-Seung Shin
Myungwoo Son
Seung Young Seo
Seung Min Lee
Soo Hyun Park
Seongshik Oh
Sangwan Sim
Moon-Ho Jo
Moon-Ho Ham
Hyunyong Choi
Hyunseung Jung
Woosun Jang
Source :: Conference on Lasers and Electro-Optics.
Publication Year :: 2018
Publisher :: OSA, 2018.
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 .

Subjects :: Surface (mathematics)
Materials science
Condensed matter physics
Terahertz radiation
chemistry.chemical_element
02 engineering and technology
Electron
021001 nanoscience & nanotechnology
01 natural sciences
Bismuth
chemistry
Topological insulator
0103 physical sciences
010306 general physics
0210 nano-technology
Spectroscopy
Ultrashort pulse
Surface states

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