Fernandez and Faisal Ahmed, Doctoral Researchers Fedor Nigmatulin, Xiaoqi Cui, Md Gius Uddin, and Professor Harri Lipsanen. In addition to Postdoctoral Researcher Hoon Hahn Yoon and Professors Zhipei Sun and Pertti Hakonen, the key Aalto members linked to the work included Postdoctoral Researchers Henry A. I believe that with further improvements in resolution and efficiency, these spectrometers could provide new tools for quantum information processing.' Our new spectrometer is a clear demonstration of the success of these collaborative efforts. For example, there has been great support from the Academy of Finland's Centre of Excellence on quantum technology, Flagship on Photonics Research and Innovation, InstituteQ, and the Otanano Infrastructure. Professor Pertti Hakonen adds that 'Finland and Aalto have invested in photonics research in recent years. From this point of view, miniaturised spectrometers are very important to offer high performance and new functions in all fields of science and industry.' There is an emerging demand in this field to improve the performance and usability of spectrometers. Professor Zhipei Sun, the head of the research team, says, 'Conventional spectrometers are bulky because they need optical and mechanical components, so their on-chip applications are limited. Shrinking computational spectrometers is essential for their use in chips and implantable applications. Imagine that the next generation of our smartphone cameras could be fitted with hyperspectral cameras that outperform colour cameras,' he adds. Integrating it directly into portable devices such as smartphones and drones could advance our daily lives. The device is entirely electrically controllable, so it has enormous potential for scalability and integration. 'With our spectrometer, we can measure light intensity at each wavelength beyond the visible spectrum using a device at our fingertips. It can achieve a high resolution comparable to benchtop systems but in a much smaller package,' says Postdoctoral Researcher Hoon Hahn Yoon. Therefore, our computational spectrometer does not require separate bulky components or array designs to disperse and filter light. We designed this optoelectronic-lab-on-a-chip with artificial intelligence replacing conventional hardware, such as optical and mechanical components. 'Our single-detector spectrometer is an all-in-one device. The research behind this new ultra-miniaturised spectrometer was published today in the journal Science. An international research team led by researchers at Aalto University has developed high-sensitivity spectrometers with high wavelength accuracy, high spectral resolution, and broad operation bandwidth, using only a single microchip-sized detector.
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