Abstract
Coherent anti-Stokes Raman scattering (CARS) has found wide applications in biomedical research. Compared with alternatives, single-beam CARS is especially attractive at low frequencies. Yet, currently existing schemes necessitate a relatively complicated setup to perform high-resolution spectroscopy. Here we show that the spectral sharp edge formed by an ultra-steep long-pass filter is sufficient for performing CARS spectroscopy, simplifying the system significantly. We compare the sensitivity of the presented methodology with available counterparts both theoretically and experimentally. Importantly, we show that this method, to the best of our knowledge, is the simplest and most suitable for vibrational imaging and spectroscopy in the very low-frequency regime (<200 cm−1).
| Original language | English |
|---|---|
| Pages (from-to) | 3637-3640 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 44 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 1 Aug 2019 |
Funding
European ICT project FAMOS (317744); Israeli Centers for Research Excellence (I-CORE); The Crown Photonics Center; Natural Science Foundation of Shaanxi Province (2014K05-11). The authors thank Ilan Hurwitz, Dekel Raanan, and Patric Oulevey for useful discussions.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics