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10 March 2020 Room-temperature fast amplitude modulator of mid-IR free-space laser beams (Conference Presentation)
Stefano Pirotta, Ngoc-Linh Tran, Giorgio Biasiol, Paul Crozat, Jean-Michel Manceau, Adel Bousseksou, Raffaele Colombelli
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Proceedings Volume 11290, High Contrast Metastructures IX; 1129016 (2020) https://doi.org/10.1117/12.2546303
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
We demonstrate a free-space amplitude modulator for mid-IR radiation ( λ around 10 µm) that can operate up at least 400 MHz (-3dB cut-off at ∼100/150 MHz) and at room-temperature. The device is based on a semiconductor hetero-structure enclosed in a judiciously designed optical resonator based on a metallic meta-surface. At zero bias, it operates in the strong light-matter coupling regime up to 300K. By applying an appropriate bias, the device transitions to the weak coupling regime: the important change in reflectivity due to the disappearance of the polaritonic states is exploited to modulate the intensity of a mid-IR laser source up to at least 400 MHz .
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Stefano Pirotta, Ngoc-Linh Tran, Giorgio Biasiol, Paul Crozat, Jean-Michel Manceau, Adel Bousseksou, and Raffaele Colombelli "Room-temperature fast amplitude modulator of mid-IR free-space laser beams (Conference Presentation)", Proc. SPIE 11290, High Contrast Metastructures IX, 1129016 (10 March 2020); https://doi.org/10.1117/12.2546303
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KEYWORDS
Mid-IR
Modulators
Quantum wells
Modulation
Reflectivity
Heterojunctions
Interferometers
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