RT Book, Section T1 Ga_2O_3 microwires as wide dynamical range temperature sensors A1 Alonso Orts, Manuel A1 Carrasco Madrigal, Daniel A1 San Juan, José M. A1 Nó, Maria L. A1 Andrés, Alicia de A1 Nogales Díaz, Emilio A1 Méndez Martín, María Bianchi AB In this work, we present our recent results on the applicability of optical microcavities based on Cr doped Ga_2O_3 wires to operate as a nanothermometer in a wide temperature range (at least from 150 up to 550 K) and achieving a temperature precision of around 1 K. To this purpose, DBR (distributed Bragg reflectors) have been used to enhance the reflectivity at the lateral ends of the wires. The transduction mechanism encompasses both the luminescence features of the characteristic R-lines of Cr^(3+) ions in this host as well as the interferometric effects of the Fabry-Perot resonances within the cavity. PB SPIE International Society SN 978-1-5106-4875-3 YR 2022 FD 2022-03-28 LK https://hdl.handle.net/20.500.14352/2475 UL https://hdl.handle.net/20.500.14352/2475 LA eng NO ©2022 Conference on Oxide-Based Materials and Devices (13. 2022. San Francisco) ISSN 0277-786XThis work has been supported by MICINN projects (RTI2018-097195-B-I00 and RTI2018-096918-B-C41). The authors also acknowledge the support from the Air Force Office of Scientific Research under Award No. FA865520-1-7013 (Program Manager: Ali Sayir). NO Ministerio de Ciencia e Innovación (MICINN) DS Docta Complutense RD 10 abr 2025