主权项 |
1. A spectrometer for identifying at least one substance in a sample, comprising:
a nanostructure diffraction grating having a grating layer that comprises a plurality of nanostructures, wherein the sample is positioned on the grating layer; a light source positioned such that light from the light source is incident on the grating layer, wherein the nanostructures are spaced with a periodic pattern having a period which is greater than wavelengths of the light such that the wavelengths are spatially dispersed by the diffraction grating; and an array of photodetectors for measuring the light from the diffraction grating at the spatially dispersed wavelengths, wherein the spectrometer is configured to identify at least one substance of the sample based on the spectra measured by the array of photodetectors. |