Single photon sources based on two-dimensional semiconductors

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K18930
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 32:Physical chemistry, functional solid state chemistry, and related fields
• Research Institution: Nagoya University
• Principal Investigator: Kitaura Ryo 名古屋大学, 理学研究科, 特任准教授 (50394903)
• Project Period (FY): 2021-07-09 – 2023-03-31
• Keywords: 二次元半導体 / 結晶成長 / 光物性

Outline of Final Research Achievements

In this study, we developed a method to control and embed luminescent centers into two-dimensional semiconductors. For example, we succeeded in substituting W and Mo into WSe2 and MoSe2, respectively, and directly embedding zero-dimensional local structures into two-dimensional crystals using a crystal growth method. By examining the optical properties of the fabricated samples in detail, we found that new optical transitions that were not observed in the parent structure appeared, and these are considered to be optical transitions derived from the embedded luminescent centers. Through this study, we succeeded in developing material technology that serves as the foundation for developing single-photon sources based on two-dimensional semiconductors, and further investigation is expected to proceed quickly in the future.

Free Research Field

ナノサイエンス

Academic Significance and Societal Importance of the Research Achievements

二次元半導体に元素をドーピングする技術は、バルク半導体と比して立ち遅れている。本研究で開発した手法は、発光中心の埋込を通した単一光子光源の実現へとつながるのみならず、二次元半導体を用いたナノデバイス作製の基本技術となる可能性を秘めたものである。また、二次元半導体にナノスケール局所構造を直接埋め込む手法はまったく新規なものであり、単一光子光源にとどまらず幅広い量子機能の発現にもつながると期待される。