We report what we believe to be the first realization of a computer-generated complex-valued hologram recorded in a single film of photoactive polymer. Complex-valued holograms give rise to a diffracted optical field with control over its amplitude and phase. The holograms are generated by a one-step direct laser writing process in which a spatial light modulator (SLM) is imaged onto a polymer film. Temporal modulation of the SLM during exposure controls both the strength of the induced birefringence and the orientation of the fast axis. We demonstrate that complex holograms can be used to impart arbitrary amplitude and phase profiles onto a beam and thereby open new possibilities in the control of optical beams.
© 2009 Optical Society of America
Original Manuscript: August 6, 2009
Revised Manuscript: October 26, 2009
Manuscript Accepted: October 26, 2009
Published: November 20, 2009
Markus Fratz, Peer Fischer, and Dominik M. Giel, "Full phase and amplitude control in computer-generated holography," Opt. Lett. 34, 3659-3661 (2009)