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Leighton RE, Alperstein AM, Punihaole D, Silva WR, Frontiera RR. Stimulated Raman versus Inverse Raman: Investigating Depletion Mechanisms for Super-Resolution Raman Microscopy. J Phys Chem B 2023; 127:26-36. [PMID: 36576851 DOI: 10.1021/acs.jpcb.2c04415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Super-resolution fluorescence microscopy has been critical in elucidating the nanoscale structure of biological systems. However, fluorescent labels bring difficulties such as perturbative labeling steps and photobleaching. Thus, label-free super-resolution techniques are of great interest, like our group's 2016 stimulated Raman scattering (SRS) technique, stimulated Raman depletion microscopy (SRDM). Inspired by stimulated emission depletion microscopy, SRDM uses a toroidally shaped beam to deplete the signal formed on the edges of the focal spot, resulting in SRS signal being detected from only a subdiffraction limited region. In initial works, the cause of the depletion was not thoroughly characterized. Here, we conclusively demonstrate suppression mechanisms in SRDM, while also contrasting approaches to super-resolution Raman microscopy on the Stokes and anti-Stokes sides of the spectrum. By monitoring the depletion of both the SRS and inverse Raman scattering (IRS) signal at a range of depletion powers, we observed other four-wave coherent Raman pathways that correspond to the introduction of the femtosecond depletion beam. In addition, we showed the depletion of the IRS signal, paving the way for a super-resolution imaging technique based on IRS, inverse raman depletion microscopy (IRDM). Combined, SRDM and IRDM offer label-free super-resolution imaging over a large spectral range to accommodate a variety of different sample constraints.
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Affiliation(s)
- Ryan E Leighton
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota55455, United States
| | - Ariel M Alperstein
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota55455, United States
| | - David Punihaole
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota55455, United States
| | - W Ruchira Silva
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota55455, United States
| | - Renee R Frontiera
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota55455, United States
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Mitrofanov AV, Rozhko MV, Voronin AA, Sidorov-Biryukov DA, Fedotov AB, Zheltikov AM. High-harmonic-driven inverse Raman scattering. OPTICS LETTERS 2021; 46:3219-3222. [PMID: 34197420 DOI: 10.1364/ol.419790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 02/18/2021] [Indexed: 06/13/2023]
Abstract
Spectral analysis of high-order harmonics generated by ultrashort mid-infrared pulses in molecular nitrogen reveals well-resolved signatures of inverse Raman scattering, showing up near the frequencies of prominent vibrational transitions of nitrogen molecules. When tuned on a resonance with the v'=0→v''=0 pathway within the B3Πg→C3Πu second positive system of molecular nitrogen, the eleventh harmonic of a 3.9 µm, 80 fs driver is shown to acquire a distinctive antisymmetric spectral profile with red-shifted bright and blue-shifted dark features as indicators of stimulated Raman gain and loss. This high-harmonic setting extends the inverse Raman effect to a vast class of strong-field light-matter interaction scenarios.
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Aloi A, Brunetti A, Perna G, Lasalvia M, Capozzi V, Tommasi R. Ultrafast transient absorption of eumelanin suspensions: the role of inverse Raman scattering. BIOMEDICAL OPTICS EXPRESS 2015; 6:4000-13. [PMID: 26504649 PMCID: PMC4605058 DOI: 10.1364/boe.6.004000] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 09/02/2015] [Accepted: 09/02/2015] [Indexed: 05/29/2023]
Abstract
An ultrafast investigation is carried out on synthetic eumelanin suspended either in water or in DMSO-methanol. Upon photoexcitation by visible femtosecond pulses, the transient absorption (TA) dynamics of the suspensions are probed in a broad visible spectral range, showing clear nonlinearities. The latter arise from pump-probe interactions that induce the inverse Raman scattering (IRS) effect. We show how eumelanin TA dynamics are modified in proximity of the solvent Stokes and anti-Stokes scattering peaks, demonstrating that IRS affects the sign of TA but not the relaxation times. We compare the results obtained in both suspensions, unveiling the role of the surrounding environment. Eventually, the intrinsic response of synthetic eumelanin to ultrafast photoexcitation is evaluated.
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Affiliation(s)
- Antonio Aloi
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Piazza G. Cesare 11, 70124, Bari,
Italy
- Institute for Complex Molecular Systems, Eindhoven University of Technology, Post Office Box 513, 5600MD Eindhoven, The
Netherlands
- Laboratory of Macromolecular and Organic Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Postoffice 513, 5600MD Eindhoven, The
Netherlands
| | - Adalberto Brunetti
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Piazza G. Cesare 11, 70124, Bari,
Italy
| | - Giuseppe Perna
- Department of Clinical and Experimental Medicine, University of Foggia, Via Napoli 20, 71122 Foggia,
Italy
| | - Maria Lasalvia
- Department of Clinical and Experimental Medicine, University of Foggia, Via Napoli 20, 71122 Foggia,
Italy
| | - Vito Capozzi
- Department of Clinical and Experimental Medicine, University of Foggia, Via Napoli 20, 71122 Foggia,
Italy
- Istituto Nazionale di Fisica Nucleare, Sez. di Bari, Via Orabona 4, 70125 Bari,
Italy
| | - Raffaele Tommasi
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Piazza G. Cesare 11, 70124, Bari,
Italy
- CNR-IPCF Bari Div., c/o Chemistry Department, via E. Orabona 4, 70125 Bari,
Italy
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Qiu X, Li X, Niu K, Lee SY. Inverse Raman bands in ultrafast Raman loss spectroscopy. J Chem Phys 2011; 135:164502. [DOI: 10.1063/1.3653940] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Owyoung A, Jones ED. Stimulated Raman spectroscopy using low-power cw lasers. OPTICS LETTERS 1977; 1:152-4. [PMID: 19680362 DOI: 10.1364/ol.1.000152] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
It is demonstrated that stimulated Raman spectroscopy (SRS) can be performed using cw dye lasers at power levels over six orders of magnitude smaller than those generally associated with pulsed stimulated Raman studies. The preliminary results suggest that cw SRS is a potentially powerful alternative to conventional spontaneous Raman scattering, with resolution limited solely by laser linewidth and sensitivity independent of resolution requirements.
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