New Hardware Fingerprinting Technique Secures Silicon Photonic Chips with Embedded Nanostructures
Photonic crystals in filler regions create unique optical IDs to thwart chip counterfeiting.
Silicon photonics is revolutionizing data communication with higher bandwidth and energy efficiency, but these integrated circuits are vulnerable to counterfeiting and tampering—threats conventional electronic security can't address. Researchers from multiple institutions propose a hardware fingerprinting technique that embeds two-dimensional photonic crystal patterns into the density control filler regions of photonic integrated circuits (PICs). Each pattern is designed to resonate at specific visible to near-infrared wavelengths, producing a distinctive optical signature based on wavelength, polarization, and incident angle. This creates a unique, unforgeable identity for every device.
The method uses finite-difference time-domain (FDTD) simulations to optimize nanostructure dimensions and spacing, achieving sub-50nm precision without requiring extra fabrication steps or materials beyond standard lithography. The resulting reflection/absorption spectra contain narrowband peaks unique to each chip, making forgery extremely difficult. This scalable, high-resolution fingerprinting approach offers cost-effective device authentication and improved supply chain security for silicon photonic chips, addressing a critical gap in the security of next-generation optical interconnects.
- Embeds 2D photonic crystal patterns into standard filler regions of photonic ICs, requiring no extra fabrication steps.
- Each pattern produces unique optical signatures (wavelength, polarization, incident angle) with sub-50nm precision.
- FDTD simulations optimize nanostructures to create narrowband reflection peaks, enabling scalable, low-cost chip authentication.
Why It Matters
Protects silicon photonic chips from counterfeiting with a low-cost, scalable optical fingerprinting method.