In this paper, a very simple and cost effective dip coating method to obtain novel hybrid PVA–InZnO transparent thin films and sandwich capacitor structures for future transparent device applications.

New hybrid Poly (vinyl) alcohol (PVA)-InTiO transparent thin film was prepared by dip-coating method. Characteristic of M-O vibrations (In-O and Ti-O) were confirmed from Fourier transform infrared spectroscopy. The X-ray diffraction patterns revealed that the mixed phases of rutile TiO 2 and cubic In 2 O 3 were present in the hybrid film. Scanning electron microscopy images showed spherical shape mixed In 2 O 3 and TiO 2 nano particles embedded in the polymer matrix. The presence of elements such as In, Ti, and O are confirmed from energy dispersive X-ray spectroscopy. High transmittance (80%) and wide band gap energy (4.1 to 3.75 eV) values were observed from optical study. High dielectric constant (18 to 23) and low dielectric loss values were obtained from dielectric study. The observed amorphous nature, enhanced optical, and dielectric properties indicated that the hybrid thin film could be used as high-к layer in transparent thin film transistor and in opto-electronic device applications in near future.

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The photonic crystal fiber (PCF) with a bunch of air holes enclosing the silica core field has momentous and compelling attributes when compared with the ordinary single-mode fibers. In this work, both the birefringence and dispersion properties of a polarization-maintaining chalcogenide (ChG) photonic crystal fiber are numerically investigated by means of the finite element method. Through simulation, it is found that the birefringence of the proposed Ge 11.5 As 24 Se 64.5 PCF can reach as high as 0.03 when compared with the conventional fiber that has merely 5 × 10 −4 for wavelengths in the 2-10 μm range. The PCF is designed with zero-dispersion wavelengths for x-and y-polarized modes in the 2-10 μm range. It is also observed that over the entire MIR wavelength range, the GVD remains positive and has a maximum value of 30,000 ps 2 /nm-km. Hence, the proposed Ge 11.5 As 24 Se 64.5 PCF plays the dual role of acting as a very good polarizationmaintaining fiber due to its very high birefringence and an excellent dispersion-compensating fiber due to its large positive GVD. This Ge 11.5 As 24 Se 64.5 PCF serves as a very good candidate for ultra-broadband high bit-rate transmission. Supercontinuum generation is another important application of PCF. Supercontinuum generation is a generation of coherent and broadband light. SC generation in PCFs has several applications in optical coherence tomography (OCT), optical frequency metrology (OFM), pulse compression, and design of ultrafast femtosecond laser pulses.