Thermo-optic coefficients of pure and Ni doped ZnO thin films

Vanadium-Oxide-Based Thin Films with Ultra-High Thermo-Optic Coefficients at 1550 nm and 2000 nm Wavelengths

“…The achieved dn/dTs in this work are considerably high compared with the dn/dT of the amorphous silicon films that were developed in in the work of [4] for the same application; the dn/dTs of the amorphous silicon films were 3.6 × 10 −4 /°C. In addition, the achieved dn/dTs in this work are also high compared with the dn/dTs of the zinc oxide thin films (−2.7 × 10 −4 /°C) [9], tantalum oxide thin films (4.76 × 10 −5 /°C) [10], aluminum oxide thin films (4.92 × 10 −5 /°C) [10] and titanium oxide thin films (−2.31 × 10 −5 /°C) [10], all of which were developed for other optoelectronic applications. Vanadium oxide is known to be a thermometer material that follows Arrhenius behavior, with a high temperature coefficient of resistance.…”

Demonstration of a ZnO-Nanowire-Based Nanograting Temperature Sensor

“…Since  is negative [31], according to (4), the wavelength gets a blue shift when the temperature rises, which is shown in Fig. 2(e).…”

“…ZnO nanowire shows superiority of much smaller profile compared to optical fiber counterparts. Furthermore, the thermo-optics coefficient of ZnO is one order higher than that of SiO 2 [26,31], and the variation of refractive of ZnO is higher with the same temperature change. With these advantages, ZnO-nanowire-based gratings have extensive potential applications in micro-and nano-environments.…”

“…Since the elasto-optical effect by thermal expansion and coefficient of thermal expansion of ZnO are invariable and about ppm level [32], respectively, and the value of the thermo-optics coefficient 2.97×10 -4 /℃ [31] is much larger, then the dominant impact of wavelength shift is due…”

Influence of annealing on the linear and nonlinear optical properties of Mn doped ZnO thin films examined by z-scan technique in CW regime

“…Praveen et al [30] conducted studies on benzimidazole metal complex thin films and found the values of b and n 2 as 8.5 cm W À1 and 9.2 cm W À1 and -3 Â 10 À5 cm 2 W À1 and À14.78 Â 10 À5 cm 2 W À1 respectively. Dar et al [31] investigated the values of b and n 2 for Ni doped ZnO thin films as 4 cmW À1 and -8.85 Â 10 À5 cm 2 W À1 . Tamgadge et al [32] conducted z-scan experiments to estimate the values of b and n 2 of SreCuO poly vinyl alcohol nano composite thin films as 1.6 Â 10 À6 cmW À1 and À8.85 Â 10 À6 cmW À1 and À17.8 Â 10 À5 cm 2 W À1 and À31.3 Â 10 À5 cm 2 W À1 respectively.…”