Tunable near-infrared dispersive quantitative phase microscopy

Nelson Cardenas; Samarendra K. Mohanty

doi:10.1117/12.909684

14 February 2012 Tunable near-infrared dispersive quantitative phase microscopy

Proceedings Volume 8231, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications VIII; 823105 (2012) https://doi.org/10.1117/12.909684
Event: SPIE BiOS, 2012, San Francisco, California, United States

Abstract

Refractive index (RI) and its dispersion play a major role in interaction of electromagnetic wave with matter. Quantitative phase imaging (QPI) has proven to be a useful tool to estimate the RI from the sample-induced phase delay measurement at high spatio-temporal resolution. Here, we introduce near-infrared dispersive quantitative phase imaging (NIRD-QPI) of microscopic objects. The setup uses a new geometry for quantitative phase microscopy by use of spatial frequency filtering in Fourier plane. High resolution refractive index spectroscopic measurement over a range from 690 to 840nm in interval of 25nm is reported. This method could prove to be very useful for characterizing wide range of nano and biomaterials.

Citation Download Citation

Nelson Cardenas and Samarendra K. Mohanty "Tunable near-infrared dispersive quantitative phase microscopy", Proc. SPIE 8231, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications VIII, 823105 (14 February 2012); https://doi.org/10.1117/12.909684

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