Well, this is in deed POET:
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MWIR and LWIR detection in the same pixel. MWIR detection (2-8um) occurs in self-assembled quantum dots with normal incidence light and no diffraction gratings, and uses only the n-type heterointerface within POET. The p-type interface results in LWIR detection (8-12um). By combining both interfaces within POET, MWIR and LWIR detection will be obtained simultaneously in the same pixel.
http://www.poet-technologies.com/poet-technologies-announces-integrated-optoelectronic-infrared-device-fabrication-and-industrial-foundry-validation/