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Article Dans Une Revue Optics Express Année : 2020

Low-voltage, broadband graphene-coated Bragg mirror electro-optic modulator at telecom wavelengths

Thomas Wood
Jérémy Lhuillier
Malik Kemiche
Pierre Demongodin
Pédro Rojo Romeo
Ali Belarouci
Lotfi Berguiga
Ségolène Callard
Xavier Letartre
Christelle Monat

Résumé

We demonstrate a graphene based electro-optic free-space modulator yielding a reflectance contrast of 20% over a strikingly large 250nm wavelength range, centered in the near-infrared telecom band. Our device is based on the original association of a planar Bragg reflector, topped with an electrically contacted double-layer graphene capacitor structure employing a high work-function oxide shown to confer a static doping to the graphene in the absence of an external bias, thereby reducing the switching voltage range to +/-1V. The device design, fabrication and opto-electric characterization is presented, and its behavior modeled using a coupled optical-electronic framework.
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Dates et versions

hal-02961285 , version 1 (08-10-2020)

Identifiants

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Thomas Wood, Jérémy Lhuillier, Malik Kemiche, Pierre Demongodin, Bertrand Vilquin, et al.. Low-voltage, broadband graphene-coated Bragg mirror electro-optic modulator at telecom wavelengths. Optics Express, 2020, 28 (19), pp.27506. ⟨10.1364/OE.398480⟩. ⟨hal-02961285⟩
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