Realization of a polymer nanowire optical transducer by using the nanoimprint technique

An optical transducer using an integrated optics polymer nanowire is proposed. The nanoimprint technique is used to fabricate an OrmoComp nanowire with 1.0 μm width and 0.5 μm height, but the resulting sidewalls are not perfectly vertical. Maximum sensitivity is achieved by enhancing the evanescent field in the cladding region. The possible mode fields and power confinement of the nanowire are studied with respect to their structural dimensions, the operating wavelength, and the cladding material by using the $\mathbf{H}$-field finite element method. The attenuation coefficient is extracted and calculated over the different cladding media, specifically air, water, and glycerol solution. It is observed that the scattering caused due to the surface roughness is the dominant effect that provides a larger attenuation coefficient.