<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Dong, Kaichen</style></author><author><style face="normal" font="default" size="100%">Li, Jiachen</style></author><author><style face="normal" font="default" size="100%">Tiancheng Zhang</style></author><author><style face="normal" font="default" size="100%">Fangda Gu</style></author><author><style face="normal" font="default" size="100%">Yuhang Cai</style></author><author><style face="normal" font="default" size="100%">Niharika Gupta</style></author><author><style face="normal" font="default" size="100%">Tang, Kechao</style></author><author><style face="normal" font="default" size="100%">Ali Javey</style></author><author><style face="normal" font="default" size="100%">Yao, Jie</style></author><author><style face="normal" font="default" size="100%">Wu, Junqiao</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Single-pixel reconstructive mid-infrared micro-spectrometer</style></title><secondary-title><style face="normal" font="default" size="100%">Opt. Express</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Fourier transform infrared spectroscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">Fourier transforms</style></keyword><keyword><style  face="normal" font="default" size="100%">Light beams</style></keyword><keyword><style  face="normal" font="default" size="100%">Light sources</style></keyword><keyword><style  face="normal" font="default" size="100%">Optical systems</style></keyword><keyword><style  face="normal" font="default" size="100%">Quantum cascade semiconductor lasers</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2023</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Apr</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://opg.optica.org/oe/abstract.cfm?URI=oe-31-9-14367</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">9</style></number><publisher><style face="normal" font="default" size="100%">Optica Publishing Group</style></publisher><volume><style face="normal" font="default" size="100%">31</style></volume><pages><style face="normal" font="default" size="100%">14367–14376</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">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.</style></abstract></record></records></xml>