@article {Dong:23,
	title = {Single-pixel reconstructive mid-infrared micro-spectrometer},
	journal = {Opt. Express},
	volume = {31},
	number = {9},
	year = {2023},
	month = {Apr},
	pages = {14367{\textendash}14376},
	publisher = {Optica Publishing Group},
	abstract = {Miniaturized spectrometers in the mid-infrared (MIR) are critical in developing next-generation portable electronics for advanced sensing and analysis. The bulky gratings or detector/filter arrays in conventional micro-spectrometers set a physical limitation to their miniaturization. In this work, we demonstrate a single-pixel MIR micro-spectrometer that reconstructs the sample transmission spectrum by a spectrally dispersed light source instead of spatially grated light beams. The spectrally tunable MIR light source is realized based on the thermal emissivity engineered via the metal-insulator phase transition of vanadium dioxide (VO2). We validate the performance by showing that the transmission spectrum of a magnesium fluoride (MgF2) sample can be computationally reconstructed from sensor responses at varied light source temperatures. With potentially minimum footprint due to the array-free design, our work opens the possibility where compact MIR spectrometers are integrated into portable electronic systems for versatile applications.},
	keywords = {Fourier transform infrared spectroscopy, Fourier transforms, Light beams, Light sources, Optical systems, Quantum cascade semiconductor lasers},
	doi = {10.1364/OE.485934},
	url = {https://opg.optica.org/oe/abstract.cfm?URI=oe-31-9-14367},
	author = {Dong, Kaichen and Li, Jiachen and Tiancheng Zhang and Fangda Gu and Yuhang Cai and Niharika Gupta and Tang, Kechao and Ali Javey and Yao, Jie and Wu, Junqiao}
}
