TY - GEN
T1 - 2D Optical- and THz-Kerr Effect in Lead Halide Perovskites
AU - Huber, Lucas
AU - Wang, Feifan
AU - Joshi, Prakriti P.
AU - Cherasse, Marie
AU - Frenzel, Maximilian
AU - Nest, Leona
AU - Wolf, Martin
AU - Zhu, Xiaoyang
AU - Maehrlein, Sebastian F.
N1 - Publisher Copyright:
© 2021 IEEE
PY - 2021/1/1
Y1 - 2021/1/1
N2 - Ultrafast optical- or magneto-optical Kerr responses exhibiting THz frequency oscillations are commonly assumed to trace coherent low-energy quasi-particles, such as phonons or magnons. Here, we decode the complex nonlinear polarization response of lead halide perovskites (LHPs) by developing two-dimensional optical Kerr spectroscopy (2D-OKE). In contrast to the quasi-particle interpretation, we unveil a unified origin for fully inorganic and hybrid LHPs, governed by anisotropic and highly-dispersive light propagation in the vicinity of the optical bandgap. Finally, to directly trace the ultrafast lattice or molecular polarization, we extend this investigation to the THz Kerr effect.
AB - Ultrafast optical- or magneto-optical Kerr responses exhibiting THz frequency oscillations are commonly assumed to trace coherent low-energy quasi-particles, such as phonons or magnons. Here, we decode the complex nonlinear polarization response of lead halide perovskites (LHPs) by developing two-dimensional optical Kerr spectroscopy (2D-OKE). In contrast to the quasi-particle interpretation, we unveil a unified origin for fully inorganic and hybrid LHPs, governed by anisotropic and highly-dispersive light propagation in the vicinity of the optical bandgap. Finally, to directly trace the ultrafast lattice or molecular polarization, we extend this investigation to the THz Kerr effect.
UR - https://www.scopus.com/pages/publications/85125329664
U2 - 10.1109/IRMMW-THz50926.2021.9567004
DO - 10.1109/IRMMW-THz50926.2021.9567004
M3 - Conference contribution
AN - SCOPUS:85125329664
T3 - International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
BT - 2021 46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021
PB - IEEE Computer Society
T2 - 46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021
Y2 - 30 August 2021 through 3 September 2021
ER -