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RF-CMOS Electronic-Photonic Sensing Elements for Millimeter-wave Front-end Systems-on-Chip: Enabling mm-wave Array Scaling/Disaggregation for Radar and Extreme Massive MIMO

Singh, Manuj Kumar; Gevorgyan, Hayk; Zhang, Xinchang; Zhang, Bohan; Popović, Miloš; Wang, Ruocheng; Buchbinder, Sidney; Stojanović, Vladimir M (March 2024, GomacTech 2024)

We demonstrate a path to scalable, wavelength- multiplexed RF/mm-wave-photonic front-end systems-on-chip for radar and extreme massive MIMO arrays, in 300mm-foundry 45nm RF SOI CMOS. We demonstrate mm-wave-to-optical sensing elements comprising low-noise amplifiers (LNAs) mono- lithically integrated with triply-resonant photonic microring- resonator based modulators. The “photonic molecule” modulator concept breaks the conventional ring modulator conversion efficiency-bandwidth tradeoff and provides optimal performance RF-photonic applications, while supporting high bandwidth den- sities. We show a first experiment with projected noise figure of 24dB at 57GHz (30mW/element, -45dBm RF-input, 6dBm laser LO). The elements are tileable at small pitches, enabling photonic disaggregation of large-scale phased arrays.
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Fully Integrated Electronic-Photonic Ultrasound Receiver Array for Endoscopic Applications in a Zero-Change 45-nm CMOS-SOI Process

https://doi.org/10.1109/JSSC.2022.3222829

Zarkos, Panagiotis; Buchbinder, Sidney; Adamopoulos, Christos; Madhvapathy, Sarika; Hsu, Olivia; Whinnery, Jake; Bhargava, Pavan; Stojanović, Vladimir (June 2023, IEEE Journal of Solid-State Circuits)

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Fast-Tuning Adiabatic Microrings for CROW Filters and Athermal WDM Receivers in a 45 nm SOI CMOS Process

https://doi.org/10.1364/CLEO_SI.2022.SF4M.2

Kramnik, Danielius; Fargas Cabanillas, Josep M.; Gluhović, Ðorđe; Buchbinder, Sidney; Popović, Miloš A.; Stojanović, Vladimir (January 2022, Conference on Lasers and Electro-Optics)

Adiabatic microrings with opposing p/n contacts achieve full carrier sweepout in reverse bias and energy-efficient carrier injection in forward bias, exhibiting 200GHz/V peak shift in C-band for athermal tuning over a 220 GHz range.
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