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Publication . Conference object . 2020

Energy splitting between 2s and 2p excitons in hBN-encapsulated monolayer WSe2

Satoshi Kusaba; Yoshiki Katagiri; Kenji Watanabe; Takashi Taniguchi; Kazuhiro Yanagi; Nobuko Naka; Koichiro Tanaka;
Closed Access
Published: 08 Nov 2020
Publisher: IEEE
Abstract

Optical sum-frequency generation spectroscopy reveals a clear dipole-inactive $2p$ exciton peak in hBN-encapsulated monolayer WSe 2 under excitation with broadband picosecond near infrared laser pulses $(\hslash\omega=0.56\sim 1.3\text{eV})$ . The splitting energy between $2s$ and $2p$ states is determined as 8. 8 ± 0.1 meV.

Subjects by Vocabulary

Microsoft Academic Graph classification: Energy level splitting Exciton Terahertz radiation Monolayer Spectroscopy Atomic physics Energy (signal processing) Materials science Excitation Picosecond

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