Broadband cavity-enhanced Kerr Comb spectroscopy on Chip
Abstract The broad and equidistant spectrum of frequency combs has had a profound impact on spectroscopic studies. Particularly, experiments involving the coupling of frequency combs to cavities have already enabled unprecedented broadband and sensitive spectroscopy on a single-molecule level. The e...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-12-01
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| Series: | npj Nanophotonics |
| Online Access: | https://doi.org/10.1038/s44310-024-00047-0 |
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| author | Andrei Diakonov Konstantin Khrizman Eliran Zano Liron Stern |
| author_facet | Andrei Diakonov Konstantin Khrizman Eliran Zano Liron Stern |
| author_sort | Andrei Diakonov |
| collection | DOAJ |
| description | Abstract The broad and equidistant spectrum of frequency combs has had a profound impact on spectroscopic studies. Particularly, experiments involving the coupling of frequency combs to cavities have already enabled unprecedented broadband and sensitive spectroscopy on a single-molecule level. The emergence of integrated, compact, and broadband Kerr-microcombs holds promise to bring many metrological and spectroscopic studies outside of the lab. However, performing cavity-enhanced direct frequency comb spectroscopy on-chip has remained a challenge. Here, we couple a microcomb source with a microcavity to extend the advantages of cavity-enhanced spectroscopy to photonically integrated circuits. By harnessing the coherent nature of the Kerr-comb and high-Q microcavity enhancement, we obtain a detailed dispersion landscape of the guided-wave mode and comprehensive frequency-dependent cavity lineshapes. Our microcomb-cavity coupling can facilitate photonically integrated cavity-enhanced biochemical spectroscopy by evanescently coupling analytes to the cavity’s guided mode, a mode of operation we analyze numerically and provide guidelines for its potential implementation. Demonstrated detailed dispersion measurements, overperforming state-of-the-art table-top tunable lasers in available bandwidth, show potential for integrated non-linear optics applications, as precise dispersion management is crucial for such processes. Our chip-scale comb-cavity coupled platform suggests an integrated, broadband, cost-effective, and accurate tool for the non-linear optics studies as well as for ultra-compact bio- and chemical-sensing platform. |
| format | Article |
| id | doaj-art-0cccdc8f79e949cc9c8768751d745316 |
| institution | OA Journals |
| issn | 2948-216X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Nanophotonics |
| spelling | doaj-art-0cccdc8f79e949cc9c8768751d7453162025-08-20T02:31:18ZengNature Portfolionpj Nanophotonics2948-216X2024-12-01111910.1038/s44310-024-00047-0Broadband cavity-enhanced Kerr Comb spectroscopy on ChipAndrei Diakonov0Konstantin Khrizman1Eliran Zano2Liron Stern3Institute of Applied Physics, The Hebrew University of JerusalemInstitute of Applied Physics, The Hebrew University of JerusalemInstitute of Applied Physics, The Hebrew University of JerusalemInstitute of Applied Physics, The Hebrew University of JerusalemAbstract The broad and equidistant spectrum of frequency combs has had a profound impact on spectroscopic studies. Particularly, experiments involving the coupling of frequency combs to cavities have already enabled unprecedented broadband and sensitive spectroscopy on a single-molecule level. The emergence of integrated, compact, and broadband Kerr-microcombs holds promise to bring many metrological and spectroscopic studies outside of the lab. However, performing cavity-enhanced direct frequency comb spectroscopy on-chip has remained a challenge. Here, we couple a microcomb source with a microcavity to extend the advantages of cavity-enhanced spectroscopy to photonically integrated circuits. By harnessing the coherent nature of the Kerr-comb and high-Q microcavity enhancement, we obtain a detailed dispersion landscape of the guided-wave mode and comprehensive frequency-dependent cavity lineshapes. Our microcomb-cavity coupling can facilitate photonically integrated cavity-enhanced biochemical spectroscopy by evanescently coupling analytes to the cavity’s guided mode, a mode of operation we analyze numerically and provide guidelines for its potential implementation. Demonstrated detailed dispersion measurements, overperforming state-of-the-art table-top tunable lasers in available bandwidth, show potential for integrated non-linear optics applications, as precise dispersion management is crucial for such processes. Our chip-scale comb-cavity coupled platform suggests an integrated, broadband, cost-effective, and accurate tool for the non-linear optics studies as well as for ultra-compact bio- and chemical-sensing platform.https://doi.org/10.1038/s44310-024-00047-0 |
| spellingShingle | Andrei Diakonov Konstantin Khrizman Eliran Zano Liron Stern Broadband cavity-enhanced Kerr Comb spectroscopy on Chip npj Nanophotonics |
| title | Broadband cavity-enhanced Kerr Comb spectroscopy on Chip |
| title_full | Broadband cavity-enhanced Kerr Comb spectroscopy on Chip |
| title_fullStr | Broadband cavity-enhanced Kerr Comb spectroscopy on Chip |
| title_full_unstemmed | Broadband cavity-enhanced Kerr Comb spectroscopy on Chip |
| title_short | Broadband cavity-enhanced Kerr Comb spectroscopy on Chip |
| title_sort | broadband cavity enhanced kerr comb spectroscopy on chip |
| url | https://doi.org/10.1038/s44310-024-00047-0 |
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