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Article Dans Une Revue IEEE Electron Device Letters Année : 2023

Optical Actuation Performance of Phase-Change RF Switches

Florence Podevin

Résumé

Optical actuation of GeTe-based radio frequency switches is studied for the first time at 915-nm optical wavelength. By inducing self-heating of the phase change material through light absorption, this approach removes the need for integrated micro-heaters. First, laser pulse conditions required to set the RF switches in ON-and OFF-states are found with optical pulse peak powers up to few hundred mW. Amorphization is obtained for optical pulses of 100 to 500 ns, and crystallization for pulses of 2 to 6 μs . A resistivity ratio of 2E4 is measured between both states. Cycling endurance is performed on a 4×5μm2 switch, overpassing 1500 cycles, which is much higher compared to previously reported optical demonstrations. Small-signal measurements show 10% lower OFF-state capacitances using optical actuation compared to electrical actuation through micro-heaters. 37 dBm power handling capability is reported in the switch OFF-state at 915 MHz. This optical actuation demonstration corresponds to a standard wavelength in integrated photonic circuits and thus, this work constitutes a first step towards a CMOS compatible fully-integrated optical actuation solution for RF switches based on phase-change material
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hal-04385463 , version 1 (10-04-2024)

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Paternité - Pas d'utilisation commerciale

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Ismaël Charlet, Sylvain Guerber, Ayoub Naoui, Benoit Charbonnier, Cécilia Dupré, et al.. Optical Actuation Performance of Phase-Change RF Switches. IEEE Electron Device Letters, 2023, 45 (3), pp.500-503. ⟨10.1109/LED.2023.3347800⟩. ⟨hal-04385463⟩
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