TY - JOUR
T1 - Photoinduced Non-thermal Topological Phase Transition in Bi2Se3 Driven by Coherent Interlayer Vibrations
AU - Park, Tae Gwan
AU - Park, Junho
AU - Oh, Eon Taek
AU - Na, Hong Ryeol
AU - Chun, Seung Hyun
AU - Lee, Sunghun
AU - Rotermund, Fabian
N1 - Publisher Copyright:
© IEEE 2022.
PY - 2022
Y1 - 2022
N2 - We present the non-thermal route of photoinduced topological phase transition driven by interlayer vibrations. By combining ultrafast optical and THz spectroscopy, which are sensitive to interlayer vibrations through photoelastic effects and Dirac surface state leading to low-energy conductivity in topological insulator Bi2Se3, we found that interfacial modes, which correspond to uniaxial strains and modulate interlayer spacing, involve the photoinduced topological phase switching from topological insulator toward normal insulator. Our observations provide fundamental insight to nanomechanical lattice-topological phase interactions for possible optoelectronic and photonic applications based on optically-driven phase transition switching at ultrafast timescales.
AB - We present the non-thermal route of photoinduced topological phase transition driven by interlayer vibrations. By combining ultrafast optical and THz spectroscopy, which are sensitive to interlayer vibrations through photoelastic effects and Dirac surface state leading to low-energy conductivity in topological insulator Bi2Se3, we found that interfacial modes, which correspond to uniaxial strains and modulate interlayer spacing, involve the photoinduced topological phase switching from topological insulator toward normal insulator. Our observations provide fundamental insight to nanomechanical lattice-topological phase interactions for possible optoelectronic and photonic applications based on optically-driven phase transition switching at ultrafast timescales.
UR - http://www.scopus.com/inward/record.url?scp=85166477552&partnerID=8YFLogxK
U2 - 10.1364/CLEOPR.2022.CTuA2D_03
DO - 10.1364/CLEOPR.2022.CTuA2D_03
M3 - Conference article
AN - SCOPUS:85166477552
SN - 2162-2701
JO - Optics InfoBase Conference Papers
JF - Optics InfoBase Conference Papers
T2 - 2022 Conference on Lasers and Electro-Optics Pacific Rim, CLEO/PR 2022
Y2 - 31 August 2022 through 5 September 2022
ER -