Abstract
Abstract This work explores thermal laser-based sensor capabilities utilising random lasing emission obtained from zinc oxide (ZnO) nanorods prepared by chemical bath deposition. The ZnO nanorods were doped with Aluminum (Al) at a concentration of 10 mM by using a simple dip method for several dip durations of 20 s, 30 s, 40 s, 60 s and 80 s, respectively. In our previous work, we successfully observed random lasing emission. Building on these findings, this work delves deeper into the thermal sensitivity of nanorod structure at room temperature within the ultraviolet (UV) range. The highest thermal sensitivity of 0.001 °C-1 was obtained from Al-doped ZnO nanorods that were dipped for 60 s. The lasing threshold was 22.92 mJ/cm2 and the lasing spectral width was 1.16 nm.
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