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4. Electrically Tunable Exciton–Plasmon Coupling in a WSe2Monolayer Embedded in a Plasmonic Crystal Cavity

Author

Dibos, Alan M., Zhou, You, Jauregui, Luis A., Scuri, Giovanni, Wild, Dominik S., High, Alexander A., Taniguchi, Takashi, Watanabe, Kenji, Lukin, Mikhail D., Kim, Philip, and Park, Hongkun

Abstract

We realize a new electroplasmonic switch based upon electrically tunable exciton–plasmon interactions. The device consists of a hexagonal boron nitride (hBN)-encapsulated tungsten diselenide (WSe2) monolayer on top of a single-crystalline silver substrate. The ultrasmooth silver substrate serves a dual role as the medium to support surface plasmon polaritons (SPPs) and the bottom gate electrode to tune the WSe2exciton energy and brightness through electrostatic doping. To enhance the exciton–plasmon coupling, we implement a plasmonic crystal cavity on top of the hBN/WSe2/hBN/Ag heterostructure with a quality factor reaching 550. The tight confinement of the SPPs in the plasmonic cavity enables strong coupling between excitons and SPPs when the WSe2exciton absorption is resonant with the cavity mode, leading to a vacuum Rabi splitting of up to 18 meV. This strong coupling can also be switched off with the application of a modest gate voltage that increases the doping density in the monolayer. This demonstration paves the way for new plasmonic modulators and a general device architecture to enhance light-matter interactions between SPPs and various embedded emitters.

Published
2019
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8. Integrated Diamond Networks for Quantum Nanophotonics

Author

Hausmann, Birgit J. M., primary, Shields, Brendan, additional, Quan, Qimin, additional, Maletinsky, Patrick, additional, McCutcheon, Murray, additional, Choy, Jennifer T., additional, Babinec, Tom M., additional, Kubanek, Alexander, additional, Yacoby, Amir, additional, Lukin, Mikhail D., additional, and Lonc̆ar, Marko, additional

Published
2012
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11. Electrically Tunable Exciton-Plasmon Coupling in a WSe 2 Monolayer Embedded in a Plasmonic Crystal Cavity.

Author

Dibos AM, Zhou Y, Jauregui LA, Scuri G, Wild DS, High AA, Taniguchi T, Watanabe K, Lukin MD, Kim P, and Park H

Abstract

We realize a new electroplasmonic switch based upon electrically tunable exciton-plasmon interactions. The device consists of a hexagonal boron nitride (hBN)-encapsulated tungsten diselenide (WSe 2 ) monolayer on top of a single-crystalline silver substrate. The ultrasmooth silver substrate serves a dual role as the medium to support surface plasmon polaritons (SPPs) and the bottom gate electrode to tune the WSe 2 exciton energy and brightness through electrostatic doping. To enhance the exciton-plasmon coupling, we implement a plasmonic crystal cavity on top of the hBN/WSe 2 /hBN/Ag heterostructure with a quality factor reaching 550. The tight confinement of the SPPs in the plasmonic cavity enables strong coupling between excitons and SPPs when the WSe 2 exciton absorption is resonant with the cavity mode, leading to a vacuum Rabi splitting of up to 18 meV. This strong coupling can also be switched off with the application of a modest gate voltage that increases the doping density in the monolayer. This demonstration paves the way for new plasmonic modulators and a general device architecture to enhance light-matter interactions between SPPs and various embedded emitters.

Published
2019
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12. Stretchable photonic crystal cavity with wide frequency tunability.

Author

Yu CL, Kim H, de Leon N, Frank IW, Robinson JT, McCutcheon M, Liu M, Lukin MD, Loncar M, and Park H

Abstract

We report a new approach for realizing a flexible photonic crystal (PC) cavity that enables wide-range tuning of its resonance frequency. Our PC cavity consists of a regular array of silicon nanowires embedded in a polydimethylsiloxane (PDMS) matrix and exhibits a cavity resonance in the telecommunication band that can be reversibly tuned over 60 nm via mechanical stretching-a record for two-dimensional (2D) PC structures. These mechanically reconfigurable devices could find potential applications in integrated photonics, sensing in biological systems, and smart materials.

Published
2013
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