This paper presents a comprehensive review of miniaturized computational spectrometers (MCS). We examine major MCS designs based on waveguides, random structures, nanowires, photonic crystals, and more. Spectrometers are key instruments in diverse fields, notably in medical and biosensing applications. Recent advancements in nanophotonics and computational techniques have contributed to new spectrometer designs characterized by miniaturization and enhanced performance. This paper presents a. A spectrometer is an instrument used to detect the spectral characteristics of optical signals, which can decompose the beam into different wavelengths or frequency components and measure the intensity of each wavelength or frequency component. A typical grating spectrometer consists of the. Miniature spectrometers discriminate the wavelength based on the position the light hits at the detector array allowing the full spectrum to be obtained with a single acquisition.
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