Quantum Coherence Tomography of Lightwave Controlled Superconductivity

Luo, L.; Mootz, M.; Kang, J. H.; Huang, C.; Eom, K.; Lee, J. W.; Vaswani, C.; Collantes, Yesusa; Hellstrom, E. E.; Perakis, I. E.; Eom, C. B.; Wang, J.

doi:10.48550/arxiv.2207.05958

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2022

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“…The substrates were placed to face the excitation beam. Further experimental details for THz spectroscopy [19][20][21][22][23] and other THz microscopy [24,25] can be found elsewhere.…”

Section: Methodsmentioning

confidence: 99%

Laser Terahertz Emission Microscope for Imaging Grain Heterogeneity: A Case Study of CH3NH3PbI3 Perovskite Semiconductors

et al. 2022

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Strong terahertz (THz) emission from the methylammonium lead iodide (MAPbI3) perovskite semiconductors has been observed following above-bandgap photoexcitation, yet local THz responses of crystalline microstructures are absent. We implement laser THz emission microscope (LTEM), yet-to-be applied to the perovskite semiconductors, as a novel and complementary tool to evaluate the electronic and grain heterogeneity of MAPbI3 thin films. Two MAPbI3 samples with different grain sizes are studied. Using this approach, we show that the one with a larger grain size gives more uniform THz radiation. More significant spatial THz intensity fluctuation is observed for the sample with a smaller grain size.

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“…The substrates were placed to face the excitation beam. Further experimental details for THz spectroscopy [19][20][21][22][23] and other THz microscopy [24,25] can be found elsewhere.…”

Section: Methodsmentioning

confidence: 99%