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An ultraminiaturized spectrometer

Scaling down spectrometers could allow their application in consumer devices Optical spectrometers can measure the intensity of light with spectral resolution. Although laboratory benchtop spectrometer systems offer high resolution and wide spectral range, their large size hampers them from being more widely adopted for general consumer products, such as wearable electronics. The miniaturization of spectrometers is crucial to making them cheaper and easier to integrate with other devices, which can help expand the use of such a powerful analytical tool. There is a wide range of potential applications for cheap and small-sized spectrometers, from detecting counterfeit pharmaceuticals and banknotes to monitoring specific biosignals. On page 296 of this issue, Yoon et al. (1) present a design for an ultraminiaturized spectrometer with performance approaching that of benchtop systems.