Analysis of an integrated tunable spectrometer for the short to mid infrared ran

An integrated, tunable spectrometer based on a silicon-on-sapphire platform is designed at wavelengths of 2.29–2.35 μm. Its pivotal component is a 4.7 μm-radius ring resonator on a graphene monolayer. Its full width at half-maximum and free spectral range are ~1.5 and ~45 nm, respectively, as found