The performance of the conventional azo-dye polymer modulation system is compared with that of the recently developed attenuated-total-reflection (ATR) dye–polymer modulation techniques. Experiments based on Fabry–Perot resonance shifting in ATR geometry indicate that the modulation parameters, namely, speed, contrast, and efficiency, are enhanced. Although the dye–polymer response still remains fairly slow, ATR methods provide substantial improvement over the existing system. An all-optic long-range surface-plasmon azo-dye polymer modulation system is also proposed. Computer simulation of the reflectance and the photoinduced resonance shifting suggest that the proposed system can be used effectively for all-optic modulation. Some of the limitations of both systems and a pratical application of the ATR modulation methods are discussed.
© 1993 Optical Society of America
Original Manuscript: August 21, 1992
Published: June 10, 1993
Araz Yacoubian and Tin M. Aye, "Enhanced optical modulation using azo-dye polymers," Appl. Opt. 32, 3073-3080 (1993)