Spectrometer including vertical stack structure and non-invasive biometric sensor including the spectrometer
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United States of America Patent
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Jan 16, 2018
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Aug 10, 2015
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Nov 3, 2014
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Abstract
Provided are a spectrometer that may be easily manufactured while having high resolution and sensitivity due to reduced light loss and a non-invasive biometric sensor including the spectrometer. The spectrometer includes: a stacked light absorbing structure including a plurality of absorbing layers stacked in a vertical direction and having different absorption wavelength bands, and a plurality of tunnel junction layers respectively interposed between the plurality of absorbing layers to electrically connect the plurality of absorbing layers; and an illuminating unit configured to provide the stacked light absorbing structure with an illumination light for saturation of the plurality of absorbing layers.
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