2016年 第77回応用物理学会秋季学術講演会

講演情報

一般セッション(口頭講演)

4 JSAP-OSA Joint Symposia 2016 » 4.6 Nanocarbon and 2D Materials

[13p-A37-1~13] 4.6 Nanocarbon and 2D Materials

2016年9月13日(火) 13:15 〜 17:45 A37 (306-307)

松田 一成(京大)、宮内 雄平(京大)

16:15 〜 16:30

[13p-A37-9] hBN-encapsulated Group-VI TMDC van der Waals Heterostructures : Fabrication and Optical properties

Mitsuhiro OKADA1、Yusuke KUREISHI1、Kenji WATANABE2、Takashi TANIGUCHI2、Hisanori SHINOHARA1、Ryo KITAURA1 (1.Nagoya Univ.、2.NIMS)

キーワード:TMDC, Heterostructure, Optical properties

Van der Waals (vdW) heterostructures composed of these 2D semiconductors, such as WS2/MoS2, offer a novel platform for optical physics, where strong inter-layer interaction drastically alters optical transitions. To explore the intrinsic properties of TMDC vdW heterostructures, high-quality samples are indispensable. Here, we report preparation and optical properties of high-quality vdW heterostructure (WS2/MoS2) which are fully encapsulated by hexagonal boron nitride (hBN)
We synthesized monolayer MoS2 and WS2 by chemical vapor deposition method and prepared thin hBN flakes by mechanical exfoliation method. hBN-encapusulated heterostuructures (hBN/WS2/MoS2/hBN) were prepared with the polymer-assisted dry-transfer method. And fabricated heterostructure showed sharp interlayer exciton peak rather than previous report. This clearly demonstrates that the quality of the fabricated is high. The results obtained in this work indicate the importance of hBN encapsulation in investigation of intrinsic physical properties of TMDC and its vdW heterostructures.