Prism coupling technique investigation of optical and thermo-optical properties of polyvinyl alcohol and polyvinyl alcohol/silica nanocomposite films

Combining ab initio and ab initio molecular dynamics simulations to predict the complex refractive indices of organic polymers

“…The relative differences for the refractive index calculated using PPFS-calculated polarizabilities are significantly smaller than the linear-fitted values, meaning that the accuracy of the PPFS method is higher than that of the linear epitaxial method. The PPFS-predicted refractive indices for PE, PVC, PVA and PLA are 1.5056, 1.5263, 1.5244 and 1.4452, respectively, which are highly consistent with the experimental refractive indices of 1.502, 59 1.510, 60 1.525 61 and 1.448 62 respectively, proving the validity and accuracy of the proposed PPFS method.…”

Transferable microfiber laser arrays for high-sensitivity thermal sensing

“…For our WGM laser sensing system, the thermal sensing mechanism of this hybrid microlaser membrane involves the thermo-optical effect of the polymer matrix PVA and PDMS elastomer. On the one hand, the value of the thermo-optic coefficient of PVA (∼−2.2 × 10 −4 K −1 ) 50 is larger than its thermo-expansion coefficient (∼3.6 × 10 −6 K −1 ), 51 thus the thermo-optic effect of PVA dominates in the blueshift of the resonant wavelength. On the other hand, temperature-induced changes in the refractive index of the PDMS 52 also result in a wavelength blueshift of the WGMs in the hybrid microresonators (ESI and Fig.…”

Solution-Processed One-Dimensional Photonic Crystals Based on Hollow Silica Exhibiting High Refractive Index Contrast

“…Its multifunctionality and performance characteristics have led to its wide application in the sensor field . In addition to this, PVA also has a relatively low refractive index ( n = 1.51) . These attributes make it an ideal candidate for integrating HS into the 1D photonic crystal multilayer coating, a process facilitated by the interactions among the hydroxyl bonds, as shown in Figure a.…”