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Article Dans Une Revue Nature Communications Année : 2021

Fast amplitude modulation up to 1.5 GHz of mid-IR free-space beams at room-temperature

Résumé

Abstract Applications relying on mid-infrared radiation ( λ ~ 3-30 μm) have progressed at a very rapid pace in recent years, stimulated by scientific and technological breakthroughs like mid-infrared cameras and quantum cascade lasers. On the other side, standalone and broadband devices allowing control of the beam amplitude and/or phase at ultra-fast rates (GHz or more) are still missing. Here we show a free-space amplitude modulator for mid-infrared radiation ( λ ~ 10 μm) that can operate at room temperature up to at least 1.5 GHz (−3dB cutoff at ~750 MHz). The device relies on a semiconductor heterostructure enclosed in a judiciously designed metal–metal optical resonator. At zero bias, it operates in the strong light-matter coupling regime up to 300 K. By applying an appropriate bias, the device transitions towards the weak-coupling regime. The large change in reflectance is exploited to modulate the intensity of a mid-infrared continuous-wave laser up to 1.5 GHz.
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Dates et versions

hal-03426829 , version 1 (12-11-2021)

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Stefano Pirotta, Ngoc-Linh Tran, Arnaud Jollivet, Giorgio Biasiol, Paul Crozat, et al.. Fast amplitude modulation up to 1.5 GHz of mid-IR free-space beams at room-temperature. Nature Communications, 2021, 12 (1), ⟨10.1038/s41467-020-20710-2⟩. ⟨hal-03426829⟩
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