Fig. 11. Computational spectrometers on silicon photonics platform.

a General schematic for computational spectrometers. b The first demonstration of computational spectrometers⁸⁷. c–e The recently demonstrated computational spectrometers on silicon photonics using disordered medium¹³, ultra-long multimode waveguide⁹⁶ and stratified waveguide filters²⁰, respectively. b Reprinted with permission from ref. ⁸⁷. © Optica Publishing Group. c Reprinted by permission from Springer Nature: Nature Photonics ref. ¹³, 2013. d Reprinted with permission from ref. ⁹⁶. © Optica Publishing Group. e Reprinted by permission from Springer Nature: Nature Communications ref. ²⁰, 2021