Ultrafast imaging of terahertz electric waveforms using quantum dots
作者机构：Experimental Physics VIII-Ultrafast DynamicsUniversity of BayreuthBayreuthGermany ARC Centre of Excellence in Exciton ScienceSchool of ChemistryUniversity of MelbourneMelbourneAustralia Physical Chemistry IUniversity of BayreuthBayreuthGermany
出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)
年 卷 期：2022年第11卷第1期
页 面：63-68页
核心收录：
学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学]
基 金：the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)via project 403711541 T.L.acknowledges funding from the European Research Council(ERC)under the European Union’s Horizon 2020 research program(grant agreement no.714968) N.K.and P.M.thank the ARC for support through grant CE170100026
摘 要：Microscopic electric fields govern the majority of elementary excitations in condensed matter and drive electronics at frequencies approaching the Terahertz(THz)***,only few imaging schemes are able to resolve sub-wavelength fields in the THz range,such as scanning-probe techniques,electro-optic sampling,and ultrafast electron ***,intrinsic constraints on sample geometry,acquisition speed and field strength limit their ***,we harness the quantum-confined Stark-effect to encode ultrafast electric near-fields into colloidal quantum dot *** approach,termed Quantum-probe Field Microscopy(QFIM),combines far-field imaging of visible photons with phase-resolved sampling of electric *** capturing ultrafast movies,we spatio-temporally resolve a Terahertz resonance inside a bowtie antenna and unveil the propagation of a Terahertz waveguide excitation deeply in the sub-wavelength *** demonstrated QFIM approach is compatible with strong-field excitation and sub-micrometer resolution—introducing a direct route towards ultrafast field imaging of complex nanodevices inoperando.
维普期刊数据库