Improved materials for all-optical signal processing

Alex Jen and co-workers publish work describing a new series of anionic polymethine dyes, designed for application in improved guest-host materials.

All-optical signal processing (AOSP) is recognized to be an extremely promising future communications systems with significantly increased operational bandwidth. Successful development of organic materials suitable for silicon-organic hybrid (SOH) devices with large nonlinearities and small optical losses in the operation wavelength is one the key factors in making such a system a success.

Now, new work from an American research team describes a novel and general material design approach to improve the optical quality of guest-host films of polymethines at high number density in amorphous polycarbonate by modifying the structure of the counterions of polymethine salts. The |c(3)| values of these guest-host blend films were found to be three times larger than that of silicon at 1550 nm, while the b values exceeded that of gallium arsenide at the same wavelength.

Integration of these highly nonlinear materials in SOH waveguides has enabled observation of four-wave mixing wavelength conversion and two-photon absorption based optical power modulation, suggesting that such guest-host materials may be attractive candidates for all-optical signal processing applications.

The research was reported in Advanced Optical Materials, a new section in Advanced Materials dedicated to breakthrough discoveries and fundamental research in photonics, plasmonics, metamaterials, and more, covering all aspects of light-matter interactions. To get Advanced Optical Materials email alerts click here. Advanced Optical Materials will start as an independent journal in 2013. More information can be found on www.advopticalmat.de.

To Top