Research Experience for Undergraduates (REU) program

The Princeton Institute for the Science and Technology of Materials (PRISM) and the Princeton Center for Complex Materials (PCCM) are sponsoring research opportunities for undergraduates in disciplines related to Materials Science. Learn more

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Every summer since 2006, Princeton REU program offers high-school and undergraduate students the opportunity to gain research experience in many participating research laboratories. Below are research posters and presentations from some of the students I advised in completing their projects.

Observation of Mechanical Stress on a PDMS Layer with Surface Wrinkles Using Cross-Polarized Light

Natalie A. Cantave, Melissa K. Cantave, Jong Bok Kim, Nicolas C. Pégard, Jason W. Fleischer

Recent work has shown that the performance of organic solar cells can be improved by introducing surface wrinkles. Due to the geometry, both optical and mechanical properties are affected. Here, we study the effects of mechanical stress on a layer of wrinkled PDMS using a cross-polarized microscope.

Imaging Zebrafish Embryo with High-Resolution Light-Field Microscopy

Natalie A. Cantave, Chien-Hung Lu, Jason W. Fleischer

Light-field distributions store spatial (x) and angular (k) information in a four-dimensional description. The most common way to obtain such information uses a lenslet array, with each lens sampling the wavefront at different positions in (x) and recording the ray angles (k). These arrays can obtain the four-dimensional information in one shot, and they have been applied to photography, microscopy, and different areas of adaptive optics. However, the array method results in poor resolution in both spatial and angular sampling, limiting its use in microscopy. Here, we combine a lenslet array with a conventional CCD camera to get high-resolution light-field images of zebrafish embryos.

3D Imaging of Time-Averaged Turbulence

Larry Thul, Kenny Harvey, Nicolas C. Pégard, Jason W. Fleischer

A statistical method based on stereoscopic temporal cross-corellation of far-field signals for 3D quantification of atmospheric turbulence.