Conference paper
Encoding arbitrary grey-level optical landscapes for trapping and manipulation using GPC
Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Optical Diagnostics and Information Processing, Optics and Plasma Research Department, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Optics and Plasma Research Department, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
With the aid of phase-only spatial light modulators (SLM), generalized phase contrast (GPC) has been applied with great success to the projection of binary light patterns through arbitrary-NA microscope objectives for real-time three-dimensional manipulation of microscopic particles. Here, we review the analysis of the GPC method with emphasis on efficiently producing speckle-free two-dimensional grey-level light Patterns.
Numerical simulations are applied to construct 8-bit grey-level optical potential landscapes with high fidelity and optical throughput via the GPC method. Three types of patterns were constructed: geometric block patterns, multi-level optical trap arrays, and optical obstacle arrays. Non-periodic patterns were accurately projected with an average of 80% diffraction efficiency.
Periodic patterns yielded even higher diffraction efficiencies, averaging 94%, by the utilization of large-aperture phase contrast filters.
| Language: | English |
|---|---|
| Publisher: | International Society for Optical Engineering |
| Year: | 2007 |
| Proceedings: | SPIE Optics and Photonics 2007 |
| Series: | Proceedings of Spie - the International Society for Optical Engineering |
| ISBN: | 0819467928 and 9780819467928 |
| ISSN: | 1996756x and 0277786x |
| Types: | Conference paper |
| ORCIDs: | Rodrigo, Peter John |
