Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2601.18031 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912848747167744 |
|---|---|
| author | Garcia, Evan P. Palacios, Yryx Y. L. Nguyen, Ryan Hanninen, Adam Noskov, Aleksei I. Potma, Eric O. Fishman, Dmitry A. |
| author_facet | Garcia, Evan P. Palacios, Yryx Y. L. Nguyen, Ryan Hanninen, Adam Noskov, Aleksei I. Potma, Eric O. Fishman, Dmitry A. |
| contents | Non-degenerate two-photon absorption (NTA) offers an attractive route for wide-field mid-infrared (MIR) imaging by mapping long wavelength information into the spectral detection windows of mature near-infrared detector technologies. However, existing NTA implementations rely almost exclusively on complex, large-footprint femtosecond laser systems, severely limiting practicality and scalability. Here, we demonstrate an NTA imaging platform that replaces the ultrafast laser with a compact nanosecond mid-IR source coupled to a high-definition indium gallium arsenide (InGaAs) camera. Operating in the nanosecond regime removes stringent temporal-overlap requirements, dramatically simplifying system architecture while preserving high nonlinear sensitivity. Using this approach, we achieve chemically selective, wide-field imaging deep into the mid-IR molecular fingerprint region and demonstrate, for the first time, video-rate NTA imaging in this spectrally rich regime. By combining relaxed alignment constraints, compact excitation, and high-speed fingerprint-region imaging, this work establishes nanosecond NTA as a practical and scalable foundation for next-generation mid-IR chemical imaging. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_18031 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Video-rate mid-infrared imaging in the molecular fingerprint region via nanosecond non-degenerate two-photon absorption Garcia, Evan P. Palacios, Yryx Y. L. Nguyen, Ryan Hanninen, Adam Noskov, Aleksei I. Potma, Eric O. Fishman, Dmitry A. Optics Non-degenerate two-photon absorption (NTA) offers an attractive route for wide-field mid-infrared (MIR) imaging by mapping long wavelength information into the spectral detection windows of mature near-infrared detector technologies. However, existing NTA implementations rely almost exclusively on complex, large-footprint femtosecond laser systems, severely limiting practicality and scalability. Here, we demonstrate an NTA imaging platform that replaces the ultrafast laser with a compact nanosecond mid-IR source coupled to a high-definition indium gallium arsenide (InGaAs) camera. Operating in the nanosecond regime removes stringent temporal-overlap requirements, dramatically simplifying system architecture while preserving high nonlinear sensitivity. Using this approach, we achieve chemically selective, wide-field imaging deep into the mid-IR molecular fingerprint region and demonstrate, for the first time, video-rate NTA imaging in this spectrally rich regime. By combining relaxed alignment constraints, compact excitation, and high-speed fingerprint-region imaging, this work establishes nanosecond NTA as a practical and scalable foundation for next-generation mid-IR chemical imaging. |
| title | Video-rate mid-infrared imaging in the molecular fingerprint region via nanosecond non-degenerate two-photon absorption |
| topic | Optics |
| url | https://arxiv.org/abs/2601.18031 |