Destructive Photon Echo Formation in Six‐Wave Mixing Signals of a MoSe2 Monolayer

Advanced Science

Paweł Machnikowski¹  Daniel Wigger¹  Karol Nogajewski²  Tilmann Kuhn³  Thilo Hahn³  Takashi Taniguchi⁴  Miroslav Bartos⁵  Diana Vaclavkova⁵  Marek Potemski⁵  Kenji Watanabe⁶  Jacek Kasprzak⁷ 

[1] Department of Theoretical Physics Wrocław University of Science and Technology Wrocław 50‐370 Poland;Institute of Experimental Physics Faculty of Physics University of Warsaw Warszawa 02‐093 Poland;Institute of Solid State Theory University of Münster Münster 48149 Germany;International Center for Materials Nanoarchitectonics National Institute for Materials Science Tsukuba 305‐0044 Japan;Laboratiore National des Champs Magnétiques Intenses LNCMI‐EMFL CNRS UPR3228, Univ. Grenoble Alpes, Univ. Toulouse, Univ. Toulouse 3, INSA‐T Grenoble and Toulouse France;Research Center for Functional Materials National Institute for Materials Science Tsukuba 305‐0044 Japan;Université Grenoble Alpes CNRS, Grenoble INP, Institut Néel Grenoble 38000 France;

关键词: nonlinear spectroscopy;    photon echo;    transition metal dichalcogenides;   

DOI  :  10.1002/advs.202103813

来源: DOAJ

【 摘 要 】

Abstract Monolayers of transition metal dichalcogenides display a strong excitonic optical response. Additionally encapsulating the monolayer with hexagonal boron nitride allows to reach the limit of a purely homogeneously broadened exciton system. On such a MoSe2‐based system, ultrafast six‐wave mixing spectroscopy is performed and a novel destructive photon echo effect is found. This process manifests as a characteristic depression of the nonlinear signal dynamics when scanning the delay between the applied laser pulses. By theoretically describing the process within a local field model, an excellent agreement with the experiment is reached. An effective Bloch vector representation is developed and thereby it is demonstrated that the destructive photon echo stems from a destructive interference of successive repetitions of the heterodyning experiment.

【 授权许可】

Unknown