5 Key Takeaways

• 1

  Researchers developed a hybrid silicon photonic and computational spectrometer achieving picometer-scale resolution across a broad bandwidth.

• 2

  The design occupies less than 0.002 mm², shifting performance burden from hardware to computational reconstruction.

• 3

  The system uses two thermally tunable trapezoidal subwavelength grating microring resonators arranged as a Vernier filter.

• 4

  It achieved picometer-scale resolution, resolving 49 absorption lines in a dense hydrogen cyanide spectrum more accurately than commercial analyzers.

• 5

  The co-design strategy may extend to lower-loss photonic platforms, enabling compact, high-resolution spectrometers for portable sensing.