Digital 2d holographic spectrometer for material characterization

A method comprising:

• deploying a probe in a subterranean environment, the probe including a dispersive spectrometer having a waveguide layer;
• dispersing electromagnetic radiation according to wavelength;
• detecting, with the dispersive spectrometer, a spectrum of the electromagnetic radiation that has interacted with the subterranean environment;
• and
• determining a characteristic of the subterranean environment based on the spectrum.

A system comprising:

• a tool to be disposed in a subterranean environment, the tool comprising a dispersive spectrometer having a plurality of detector elements disposed along a waveguide layer that is to diffract the electromagnetic radiation according to wavelength, wherein each detector element is to detect the electromagnetic radiation associated with a portion of the wavelength of the electromagnetic radiation after the electromagnetic radiation has interacted with the subterranean environment;
• a processor;
• and
• a computer-readable medium having instructions stored thereon that are executable by the processor to cause the processor to:
• determine a characteristic of the subterranean environment based on the detected electromagnetic radiation.