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説明:

Devices based on two-dimensional (2D) semiconductors hold promise for the realization of compact and versatile on-chip interconnects between electrical processors and optical transmission lines. Although light emitting diodes (LEDs) and lasers are fundamental building blocks for the realization of optical interconnects, the integration of conventional light sources made of classical semiconductors to complementary metal- oxide-semiconductor (CMOS) integrated circuits remains challenging. While LEDs based on van der Waals heterostructures have been realized, the electrical control of the emission properties necessary for information processing remains limited. Here, we show for the first-time room-temperature electrical control of the location, directionality and polarization of light emitted from a 2D LED operating at MHz frequencies. We integrate the LED in a planar cavity to couple the photon emission angle to the in-plane exciton momentum, controlled by a lateral voltage. We further demonstrate circularly polarized photon emission coupled to the electrically generated valley polarization of electrons and holes. These findings demonstrate the potential of TMDCs as fast, compact and tunable light sources for the development of next-generation integrated photonics. Our cavity-coupled LED has potential for the development of electrically driven polariton lasers9 compatible with CMOS technology.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: 2D semiconductors, light emitting diodes, polariton lasers

刊行年月日: 2022-08-19

出版者: Springer Science and Business Media LLC

掲載誌:

• Nature Communications (ISSN: 20411723) vol. 13 issue. 1 4884

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/s41467-022-32292-2

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更新時刻: 2025-02-27 08:31:21 +0900

MDRでの公開時刻: 2025-02-27 08:31:21 +0900