Inkjet Printing of Optical Waveguides for Single‐Mode Operation

Abstract

Inkjet printing of high‐refractive‐index optical waveguides designed for single‐mode operation is presented. A waveguide core is printed with titanium dioxide nanoparticles that form a straight strip with a high refractive index. The quartz glass without preliminary processing is used as a substrate. The optimal waveguide thickness to provide single‐mode operation in the near‐IR range is calculated. The number of printed layers necessary to obtain the required thickness and the refractive index is established. The printing parameters to provide suitable morphology for waveguide application are thoroughly studied. Measurements confirm light propagation through the printed waveguides at 1.55 µm wavelength, and the mean power loss is estimated as 3.52 dB cm−1. The branched structure is printed, and its ability to transmit and split light is demonstrated. The received data have a directly applied value for application in the future development of integrated optical circuits and printing technologies.

Controlled Growth of Stable β-Glycine via Inkjet Printing

“…The most crucial parameters impacting the hydrodynamic numbers are viscosity and surface tension. In accordance with the equations of Ohnesorge theory, the Z number in final composition of the inks must be in the range 1–10. , At the same time, we obtained the optimum glycine concentration in the drop. After optimization, the final ink composition has the following parameters: viscosity 3.1 cP, surface tension 35 mN/m.…”

“…In accordance with the equations of Ohnesorge theory, the Z number in final composition of the inks must be in the range 1−10. 33,34 At the same time, we obtained the optimum glycine concentration in the drop. After optimization, the final ink composition has the following parameters: viscosity 3.1 cP, surface tension 35 mN/ m. Full ink parameters and hydrodynamic numbers are given in Table S1.…”

Inkjet Printing of Sc-Doped TiO2 with Enhanced Photoactivity

“…Among the potential drawbacks of the inkjet process of multicomponent systems are phase separation and coffee-ring formation [29]. These problems were profoundly studied in previously works [30,31]; thus, in the present work we found optimal printing parameters and drying conditions for uniform film deposition in order to prevent the abovementioned challenges.…”

Effect of temperature and humidity on the sensing performance of TiO2 nanowire-based ethanol vapor sensors

“…Titanium dioxide (TiO 2 ) is an important metal oxide semiconductor (MOS) that is desirable for many applications, such as pigment [1], solar cells [2], optical waveguides [3], filters [4], and gas sensors [5]. Researchers present their properties via quantum confinement and surface effect by reducing the size of TiO 2 crystals to nanoscale dimensions [6,7].…”