Martin Fischer

Martin Fischer

Associate Research Professor in the Department of Chemistry

Office Location: 
2216 French Science Center, 124 Science Drive, Durham, NC 27708
Front Office Address: 
Box 90346, Durham, NC 27708-0346
Phone: 
(919) 660-1523

Overview

Dr. Fischer’s research focuses on exploring novel nonlinear optical contrast mechanisms for molecular imaging. Nonlinear optical microscopes can provide non-invasive, high-resolution, 3-dimensional images even in highly scattering environments such as biological tissue.

Established contrast mechanisms, such as two-photon fluorescence or harmonic generation, can image a range of targets (such as autofluorescent markers or some connective tissue structure), but many of the most molecularly specific nonlinear interactions are harder to measure with power levels one might be willing to put on tissue. In order to use these previously inaccessible interactions as structural and molecular image contrasts we are developing ultrafast laser pulse shaping and pulse shape detection methods that dramatically enhance measurement sensitivity. Applications of these microscopy methods range from imaging biological tissue (mapping structure, endogenous tissue markers, or exogenous contrast agents) to characterization of nanomaterials (such as graphene and gold nanoparticles). The molecular contrast mechanisms we originally developed for biomedical imaging also provide pigment-specific signatures for paints used in historic artwork. Recently we have demonstrated that we can noninvasively image paint layers in historic paintings and we are currently developing microscopy techniques for use in art conservation and conservation science.

Education & Training

  • Ph.D., University of Texas at Austin 2001

  • M.A., University of Texas at Austin 1993

Selected Grants

Advanced Light Imaging and Spectroscopy (ALIS) awarded by (Principal Investigator). 2019 to 2022

OP: Collaborative Research: Multimodal Molecular Spectroscopy and Imaging in Biological Tissue and Historical Artwork awarded by National Science Foundation (Principal Investigator). 2016 to 2019

Improving Melanoma Diagnosis with Pump-Probe Optical Imaging awarded by National Institutes of Health (Researcher). 2013 to 2017

Collaborative Research: Development of Novel Nonlinear Optical Contrast for Artwork Imaging awarded by National Science Foundation (Principal Investigator). 2013 to 2017

Yu, Jin, et al. “Visualization of vermilion degradation using pump-probe microscopy..” Science Advances, vol. 5, no. 6, June 2019. Epmc, doi:10.1126/sciadv.aaw3136. Full Text

Yang, J. K. W., et al. “Design, manufacture, and analysis of photonic materials for historical and modern visual art: Feature issue introduction.” Optical Materials Express, vol. 9, no. 5, May 2019. Scopus, doi:10.1364/OME.9.002128. Full Text

Ju, Kuk-Youn, et al. “Unraveling the molecular nature of melanin changes in metastatic cancer..” Journal of Biomedical Optics, vol. 24, no. 5, Apr. 2019, pp. 051414–051414. Manual, doi:10.1117/1.jbo.24.5.051414. Full Text

Ju, Kuk-Youn, et al. “Understanding the Role of Aggregation in the Broad Absorption Bands of Eumelanin..” Acs Nano, vol. 12, no. 12, Dec. 2018, pp. 12050–61. Epmc, doi:10.1021/acsnano.8b04905. Full Text

Yu, Jin, et al. “Spectroscopic Differentiation and Microscopic Imaging of Red Organic Pigments Using Optical Pump-Probe Contrast..” Analytical Chemistry, vol. 90, no. 21, Nov. 2018, pp. 12686–91. Epmc, doi:10.1021/acs.analchem.8b02949. Full Text

Liu, Xiaojun, et al. “Enhanced Two-Photon Photochromism in Metasurface Perfect Absorbers..” Nano Letters, vol. 18, no. 10, Oct. 2018, pp. 6181–87. Epmc, doi:10.1021/acs.nanolett.8b02042. Full Text

Stanton, I. N., et al. “Power-Dependent Radiant Flux and Absolute Quantum Yields of Upconversion Nanocrystals under Continuous and Pulsed Excitation.” Journal of Physical Chemistry C, vol. 122, no. 1, Jan. 2018, pp. 252–59. Scopus, doi:10.1021/acs.jpcc.7b11929. Full Text

Wilson, Jesse W., et al. “Comparison of pump-probe and hyperspectral imaging in unstained histology sections of pigmented lesions..” Biomedical Optics Express, vol. 8, no. 8, Aug. 2017, pp. 3882–90. Epmc, doi:10.1364/BOE.8.003882. Full Text

Robles, Francisco E., et al. “Label-Free Imaging of Female Genital Tract Melanocytic Lesions With Pump-Probe Microscopy: A Promising Diagnostic Tool..” J Low Genit Tract Dis, vol. 21, no. 2, Apr. 2017, pp. 137–44. Pubmed, doi:10.1097/LGT.0000000000000290. Full Text

Robles, Francisco E., et al. “Stimulated Raman scattering spectroscopic optical coherence tomography..” Optica, vol. 4, no. 2, Feb. 2017, pp. 243–46. Epmc, doi:10.1364/OPTICA.4.000243. Full Text

Pages

Robles, Francisco E., et al. “Dispersion-based stimulated Raman scattering spectroscopy, holography, and optical coherence tomography (Conference Presentation).” Multiphoton Microscopy in the Biomedical Sciences Xvi, SPIE, 2016. Crossref, doi:10.1117/12.2212875. Full Text

Warren, W. S., et al. “Melanin-targeted nonlinear microscopy for label-free molecular diagnosis and staging.” Optics Infobase Conference Papers, 2016. Scopus, doi:10.1364/TRANSLATIONAL.2016.TTh3B.3. Full Text

Villafana, Tana, et al. “3D chemical imaging of historic artworks and cultural heritage materials.” Abstracts of Papers of the American Chemical Society, vol. 251, AMER CHEMICAL SOC, 2016.

Wilson, J. W., et al. “Real-time digital signal processing in multiphoton and time-resolved microscopy.” Progress in Biomedical Optics and Imaging  Proceedings of Spie, vol. 9703, 2016. Scopus, doi:10.1117/12.2218102. Full Text

Villafana, T. E., et al. “Ultrafast pump-probe dynamics of iron oxide based earth pigments for applications to ancient pottery manufacture.” Proceedings of Spie  the International Society for Optical Engineering, vol. 9527, 2015. Scopus, doi:10.1117/12.2184758. Full Text

Wilson, J. W., et al. “Separating higher-order nonlinearities in transient absorption microscopy.” Proceedings of Spie  the International Society for Optical Engineering, vol. 9584, 2015. Scopus, doi:10.1117/12.2187133. Full Text

Samineni, P., et al. “Nonlinear phase contrast imaging in neuronal tissue.” Optics Infobase Conference Papers, 2011.

Warren, W. S. “Tissue imaging with shaped femtosecond laser pulses.” Optics Infobase Conference Papers, 2009.

Gutiérrez-Medina, B., et al. “Observation of the quantum zeno and anti-zeno effects in an unstable system.” Technical Digest  Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, Qels 2001, 2001, p. QPD1.1-QPD1.2. Scopus, doi:10.1109/QELS.2001.962243. Full Text