Cross-Scale Imaging through Multimode Fibers: from Macro to Nano

Departments: Applied Physics
Time: Monday, August 5, 2024 - 11:00am - 12:00pm
Type: Solid State and Optics Seminar
Presenter: Dr. Andre D. Gomes
Room/Office: Becton 227 or via zoom
Location:
Becton Room 227
10 Hillhouse Avenue
New Haven, CT 06511
United States
See map: Google Maps

Cross-Scale Imaging through Multimode Fibers: from Macro to Nano

A multimode optical fiber (MMF) can guide thousands of spatial modes, making it an extremely efficient tool for light transport. However, coupling a coherent light field into such an MMF results in a seemingly random output speckle pattern due to the interference between the different modes. Despite this apparent disorder, light propagation in an MMF is deterministic and can be controlled using holographic wavefront shaping methods. By leveraging these techniques, a thin MMF can be transformed into a powerful imaging device suitable for a multitude of applications.

This talk will introduce the principles of holographic control of light in multimode fibers. Subsequently, the application of MMFs towards imaging at different scales will be showcased, covering a range of scenarios from far-field imaging of macroscopic objects to microscopy inside deep brain tissue, and even beyond the diffraction limit using stimulated emission depletion (STED) super-resolution imaging.

Host: Hui Cao

 https://yale.zoom.us/j/96290847119?pwd=hi1vF0zQKG7LcXHRXrASR0SttbLbzz.1
    Password: 748285