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Article Dans Une Revue Journal of the Optical Society of America B Année : 2020

Towards low-power near-infrared modulators operating at telecom wavelengths: when graphene plasmons frustrate their metallic counterparts

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

Résumé

A free-space electro-optic modulator device exploiting graphene's surface plasmon polariton (SPP) at near-infrared frequencies is proposed and theoretically studied. The device is made up of two resonant structures, the first being a metallic SPP displaying broadband absorption, and the second graphene's own SPP, which is shown to frustrate the metallic plasmon when excited, leading to a narrow reflectance peak. Doping of the graphene to achieve Fermi-level tuning is shown to shift the wavelength of the frustration phenomenon, thereby enabling the use of the device as a modulator. A reduction of 20% in the switching energy is expected due to the unique principle of operation which, crucially and contrary to most work in this field, does not rely on electroabsorption but electrorefraction changes in graphene. This coupled SPP resonator geometry also permits efficient channeling of optical energy from free space into graphene's SPP at near-infrared frequencies.
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Dates et versions

hal-02618631 , version 1 (08-10-2020)

Identifiants

Citer

Thomas Wood, Malik Kemiche, Jérémy Lhuillier, Pierre Demongodin, Bertrand Vilquin, et al.. Towards low-power near-infrared modulators operating at telecom wavelengths: when graphene plasmons frustrate their metallic counterparts. Journal of the Optical Society of America B, 2020, 37 (5), pp.1563. ⟨10.1364/JOSAB.391277⟩. ⟨hal-02618631⟩
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