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Electroholographic tunable volume grating in the g44 configuration
Assaf Bitman1, Noam Sapiens, Lavi Secundo
1Department of Applied Physics, The Benin School of Engineering and Computer Science, The Hebrew University, Jerusalem, Israel.
Optics Letters
|September 14, 2006
Summary
The g(44) grating, an electroholographic device, acts as an electrically controlled filter. It fulfills the Bragg condition for specific applied fields, enabling tunable optical filtering with a 7 nm range.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Electroholographic gratings offer tunable optical properties.
- The g(44) configuration involves specific field and wave vector orientations.
Purpose of the Study:
- To investigate the optical behavior of the g(44) electroholographic grating.
- To demonstrate its potential as an electrically controlled tunable filter.
Main Methods:
- Theoretical analysis of light propagation through a periodically rotating index ellipsoid.
- Experimental verification of the Bragg condition and polarization dynamics.
- Measurement of filter tunability in a 2mm thick grating.
Main Results:
- The g(44) configuration fulfills the Bragg condition at a specific applied field.
- Diffracted beam polarization is perpendicular to the incident beam polarization.
- A tunable optical filter with a 7 nm tuning range was demonstrated.
Conclusions:
- The g(44) grating functions as an effective electrically controlled optical filter.
- Its tunable nature makes it suitable for various photonic applications.
- Further research can explore enhanced tunability and device integration.
