High‐Optical‐Quality Blends of Anionic Polymethine Salts and Polycarbonate with Enhanced Third‐Order Non‐linearities for Silicon‐Organic Hybrid Devices
Source abstract
Abstract
A series of anionic polymethine dyes with different aromatic counterions are prepared to improve their compatibility as guests in an amorphous polycarbonate host. When they are used as the cladding material for silicon hybrid slot waveguides, four-wave mixing wavelength conversion and two-photon absorption-based optical-power modulation are observed. Such guest-host materials may be attractive candidates for all-optical signal-processing applications.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Photonic and Optical Devices · Advanced Fiber Laser Technologies · Photonic Crystals and Applications
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References (27)
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17. Conversion between the cgs units presented here and MKS units can be accomplished according to the following:χ(3)[m2V−2 MKS] = (4π/9 × 10−8)χ(3)[esu or cm2statVolt−2 cgs]. Accordingly the values of |χ(3)| in Table 2 exhibit an average value of 5.8 × 10−19m2V−2. These third‐order susceptibilities can also be converted to non‐linear refractive indices (n2) according to the following equation:n2= 3Reχ(3)/(4ϵ0cn02) wheren0is the refractive index of the medium. Consequently the values of Reχ(3)in Table S2 can be converted to an average value ofn2= −5.0 × 10−17m2W−1.
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27. Guest‐host blends with slightly lower doping wt% (25 wt% instead of 50 wt%) were chosen for the organic claddings due to larger linear losses found in the SOH waveguides than those measured in free‐space (see Table 2). As no additional measures were taken to ensure optimal interfacial coupling between the cladding and guide this discrepancy is likely due to additional scattering losses in the SOH geometry. Nonetheless the optical losses of the 25 wt%AJBC 1723and1725cladding films were found to be 17 and 10 dB/cm respectively.