Room-temperature electrical control of polarization and emission angle in a cavity-integrated 2D pulsed LED

Juan Francisco Gonzalez Marin, Dmitrii Unuchek, Zhe Sun, Cheol Yeon Cheon, Fedele Tagarelli, Kenji Watanabe, Takashi Taniguchi and Andras Kis ()
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Juan Francisco Gonzalez Marin: Institute of Electrical and Microengineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-
Dmitrii Unuchek: Institute of Electrical and Microengineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-
Zhe Sun: Institute of Electrical and Microengineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-
Cheol Yeon Cheon: Institute of Electrical and Microengineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-
Fedele Tagarelli: Institute of Electrical and Microengineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-
Kenji Watanabe: Research Center for Functional Materials, National Institute for Materials Science
Takashi Taniguchi: International Center for Materials Nanoarchitectonics, National Institute for Materials Science
Andras Kis: Institute of Electrical and Microengineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Devices based on two-dimensional (2D) semiconductors hold promise for the realization of compact and versatile on-chip interconnects between electrical and optical signals. Although light emitting diodes (LEDs) are fundamental building blocks for integrated photonics, the fabrication of light sources made of bulk materials on complementary metal-oxide-semiconductor (CMOS) circuits is challenging. While LEDs based on van der Waals heterostructures have been realized, the control of the emission properties necessary for information processing remains limited. Here, we show 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 polariton emission angle and polarization to the in-plane exciton momentum, controlled by a lateral voltage. These findings demonstrate the potential of TMDCs as fast, compact and tunable light sources, promising for the realization of electrically driven polariton lasers.

Date: 2022
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DOI: 10.1038/s41467-022-32292-2

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