تقرير
Mid-infrared supermirrors with finesse exceeding 400 000
| العنوان: | Mid-infrared supermirrors with finesse exceeding 400 000 |
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| المؤلفون: | Truong, G. -W., Perner, L. W., Bailey, D. M., Winkler, G., Cataño-Lopez, S. B., Wittwer, V. J., Sudmeyer, T., Nguyen, C., Follman, D., Fleisher, A. J., Heckl, O. H., Cole, G. D. |
| سنة النشر: | 2022 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics |
| الوصف: | For trace gas sensing and precision spectroscopy, optical cavities incorporating low-loss mirrors are indispensable for path length and optical intensity enhancement. Optical interference coatings in the visible and near-infrared (NIR) spectral regions have achieved total optical losses below 2 parts per million (ppm), enabling a cavity finesse in excess of 1 million. However, such advancements have been lacking in the mid-infrared (MIR), despite substantial scientific interest. Here, we demonstrate a significant breakthrough in high-performance MIR mirrors, reporting substrate-transferred single-crystal interference coatings capable of cavity finesse values from 200 000 to 400 000 near 4.5 um, with excess optical losses (scatter and absorption) below 5 ppm. In a first proof-of-concept demonstration, we achieve the lowest noise-equivalent absorption in a linear cavity ring-down spectrometer normalized by cavity length. This substantial improvement in performance will unlock a rich variety of MIR applications for atmospheric transport and environmental sciences, detection of fugitive emissions, process gas monitoring, breath-gas analysis, and verification of biogenic fuels and plastics. Comment: Sept 21: Minor revisions to conform to 2-page length requirement including abbr. refs.; Figure font sizes increased Jul 24: Major revisions, including hybrid mirrors and spectroscopy |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1038/s41467-023-43367-z |
| URL الوصول: | http://arxiv.org/abs/2209.09902 |
| رقم الأكسشن: | edsarx.2209.09902 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1038/s41467-023-43367-z |
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