The mPPU Architecture: Magneto-scopic Photonic Processing Units

Added Supporting Work 2025-12-13: https://doi.org/10.1038/s41467-025-65937-z

CMOS-fabricated acousto-optic modulator using AlN piezoelectric/SiNx photonic integration—validates gigahertz-frequency optomechanical coupling for visible light control (Nature Comm., Dec 2025)

Via: Freedman, J.M., Storey, M.J., Dominguez, D. et al. Gigahertz-frequency acousto-optic phase modulation of visible light in a CMOS-fabricated photonic circuit. Nat Commun 16, 10959 (2025).

ADDITIONAL: https://doi.org/10.1364/optica.577791

Chip-scale magnetometer demonstration—validates magneto-optic integration requirements for OGC magnetic stabilization (UCSB/MIT, Dec 2025).

Via: Paolo Pintus, Heming Wang, Sudharsanan Srinivasan, Sergio Pinna, Duanni Huang, Yuya Shoji, Caroline A. Ross, John E. Bowers, and Galan Moody, "Integrated magneto-optic-based magnetometer: classical and quantum limits," Optica 12, 1936-1945 (2025)

ADDITIONAL: https://doi.org/10.1002/adfm.202525269

Femtosecond laser fabrication of phononic nanostructures for thermal management—demonstrates CMOS-compatible, wafer-scale nanofabrication with 1000x throughput improvement, validating NDLA approach and thermal engineering requirements (Advanced Functional Materials, Dec 2025)

Via: H. Hamma, R. Anufriev, K. Fushinobu, M. Nomura, and B. Kim, “ Scalable Thermal Engineering via Femtosecond Laser-Direct-Written Phononic Nanostructures.” Adv. Funct. Mater. (2025): e25269.

Added Supporting Work 2025-12-15: https://doi.org/10.48550/arXiv.2509.07383 

Validates the mechanical stability of ferrule-based fiber-to-sample coupling (precursor to OGC integration) and demonstrates phase-resolved numerical analysis for extracting magneto-optic signals in high-noise pulsed field environments.

Via: Ikeda, A., et al. (2025). "Magneto-optical Kerr-effect measurements under pulsed magnetic fields over 40 T using a compact sample fixture" arXiv:2509.07383.

Added Supporting Work 2025-12-16: https://doi.org/10.48550/arXiv.2507.01796

This work demonstrates femtosecond-scale measurement of magnon dynamics using ultrabroadband THz-emission spectroscopy, revealing that angular momentum transfer from magnons to conduction electrons occurs in less than 10 femtoseconds - before substantial demagnetization occurs. The experimental techniques provide direct observational capability for the ultrafast magnon behavior that forms the theoretical foundation of magneto-photonic processing architectures.

Via: R. Rouzegar et al., "Femtosecond signatures of optically induced magnons before ultrafast demagnetization," arXiv:2507.01796 [cond-mat.mes-hall], Jul. 2025. [Online]. Available: https://doi.org/10.48550/arXiv.2507.01796

ADDITIONAL: https://doi.org/10.1038/s41467-025-65937-z 

CMOS-fabricated acousto-optic phase modulator with 80x power reduction—validates scalable fabrication approach for OGC transduction and photonic compute fabric (Nature Communications, Dec 2025)

Via: J. M. Freedman et al., “Gigahertz-frequency acousto-optic phase modulation of visible light in a CMOS-fabricated photonic circuit,” Nature Communications, vol. 16, no. 1, p. 10959, 2025, doi: 10.1038/s41467-025-65937-z 

ADDITIONAL: https://doi.org/10.1038/s41565-025-02090-0

Phonon engineering in α-MoO₃/AlN heterostructures enables hyperbolic asymptotic line polaritons with broadband modulation (~55 cm⁻¹) and 90° tuning range—validates photonic guide layer mechanisms for precise wavevector control and zero-phase propagation (Nature Nanotechnology, Dec 2025)

Via: Zhang, S., Ma, P., You, O. et al. Phonon engineering enables hyperbolic asymptotic line polaritons. Nat. Nanotechnol. (2025).

Added Supporting Work 2025-12-30: https://doi.org/10.1126/science.adn8625

Thermal simulations comparing periodic and Fibonacci-patterned Ce:YIG lattice architectures reveal substantial differences in heat accumulation under high-frequency (100 GHz) driving conditions. The quasiperiodic Fibonacci topology, realized via selective laser annealing of crystalline islands within an amorphous YIG matrix, demonstrated a maximum temperature reduction of approximately 200× relative to a conventional periodic etched lattice (T_max = 0.036 vs. 7.82 normalized units). This result suggests that quasiperiodic geometries may passively suppress phonon resonance cascades, providing an intrinsic thermal management mechanism without active cooling components. The approach draws conceptual inspiration from recent experimental observations of Many-Body Dynamical Localization in driven quantum systems (Guo et al., 2025), wherein quasiperiodic potentials prevent thermalization—though direct experimental confirmation in room-temperature magneto-optical substrates remains an open research direction.

Via: Guo, Y., Dhar, S., Yang, A., Chen, Z., Yao, H., Horvath, M., Ying, L., Landini, M., & Nägerl, H.-C. (2025). Observation of many-body dynamical localization. Science.

Added Supporting Work 2026-01-07: https://doi.org/10.1038/s41567-025-03117-y

Optical control of orbital magnetism in magic-angle twisted bilayer graphene via inverse Faraday effect—demonstrates circularly polarized near-infrared light inducing orbital magnetization and controlling anomalous Hall effect hysteresis. Validates magneto-photonic coupling in graphene heterostructures central to OGC architecture and maglev'd graphene concepts (Nature Physics, Jan 2026).

Via: E. Persky, L. Parisot, M. He, J. Cai, T. Taniguchi, K. Watanabe, J. May-Mann, X. Xu, and A. Kapitulnik, "Optical control of orbital magnetism in magic-angle twisted bilayer graphene," Nat. Phys. (2026). doi: 10.1038/s41567-025-03117-y

Added Supporting Work 2026-01-14: https://doi.org/10.1038/s41566-025-01832-9

Experimental validation of the heterogeneous photonic integration pathway central to the mPPU architecture. The authors demonstrate successful integration of lithium tantalate electro-optic modulators onto standard silicon photonics chips using micro-transfer printing, achieving 3.5V half-wave voltage, 2.9 dB insertion loss, and >70 GHz modulation speeds while maintaining compatibility with monolithic germanium photodetectors and existing CMOS process design kits.

Niels, M., Vanackere, T., Vissers, E. et al. "A high-speed heterogeneous lithium tantalate silicon photonics platform." Nature Photonics (2026). 

Added Supporting Work 2026-01-21: https://doi.org/10.1038/s41467-025-66529-7

Bionic LiDAR system demonstrates chip-scale adaptive beam steering using reconfigurable electro-optic frequency combs on thin-film lithium niobate (TFLN)—validates the core "software-defined optical routing" principle central to the mPPU Retina architecture. The system achieves dynamic reallocation of optical channels via voltage-controlled comb spacing, directly analogous to our LC-metasurface steering layer. Demonstrates 0.012° angular resolution through what they call "micro-parallelism"—using moderate physical channels repositioned dynamically rather than brute-force scaling. Their finding that "adaptive focusing is fundamentally harder in active sensors because you must manage optical power, receiver sensitivity, and digitization bandwidth" reinforces our decision to implement the Fibonacci topology for SNR preservation. (Nature Communications, Jan 2026)

Via: R. Chen, X. Wang, et al. "Integrated bionic LiDAR for adaptive 4D machine vision," Nat. Commun. (2025). doi: 10.1038/s41467-025-66529-7