Monolithic spectrometer based on intersubband transitions in quantum wells

We present a new device based on the association of a quantum-well infrared photodetector and an asymmetric quantum-well infrared modulator in a three-terminal monolithic structure. This device is shown to allow the spectral analysis of an infrared signal. A large tunability and a constant responsivity make this device an ideal candidate for a solid-state infrared spectrometer.<
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