Abstract
A three-laser-beam technique is developed to study the transient diffraction efficiency of M-state dynamic phase holograms in a D96N mutant bacteriorhodopsin film (BR). A CW beam from 532 nm doubled Nd:YAD laser is used to pump BR molecules from B-state to photoexcited M-state. Then the M-state absorption laser 413-nm wavelength from a Krypton Ion laser is used to write holographic gratings in the excited M-state. The writing process also depletes M-molar concentrations. This process offers the advantages of better modulation and faster response. The reading is done with a 680 nm laser, which is far away from the absorption bands to ensure a negligible erasing effect on the gratings written in the film, resulting a pure phase hologram with high efficiency. A maximized transient peak diffraction efficiency approaches a saturated value when the ratio of write to pump intensity is approximately unity.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 206-214 |
| Number of pages | 9 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3468 |
| State | Published - 1998 |
| Externally published | Yes |
| Event | Proceedings of the 1998 Conference on Advanced Optical Memories and Interfaces to Computer Storage - Duration: Jul 22 1998 → Jul 24 1998 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering