RT Book, Section
T1 Exciting and confining light in Cr doped gallium oxide
A1 Alonso Orts, Manuel
A1 Nogales Díaz, Emilio
A1 San Juan, José M.
A1 Nó, María L.
A1 Méndez Martín, María Bianchi
AB On one hand, interest on the tunability of the optical microcavities has increased in the last few years due to the need for selective nano-and microscale light sources to be used as photonic building blocks in several applications. On the other, transparent conductive oxide (TCO) beta-Ga_2O_3 is attracting attention in the optoelectronics area due to its ultra wide band gap and high breakdown field. However, at the micro- and nanoscale there are still some challenges to face up, namely the control and tuning of the optical and electrical properties of this oxide. In this work, Cr doped Ga_2O_3 elongated microwires are grown using the vapor-solid (VS) mechanism. Focused Ion Beam (FIB) etching forms Distributed Bragg Reflector (DBR)-based resonant microcavities. Room temperature microphotoluminescence (mu-PL) spectra show strong modulations in the red-NIR range on five cavities with different lengths. Selectivity of the peak wavelengths is obtained, proving the tunability of this kind of optical systems. The confined modes are analyzed experimentally, analytically and via finite difference time domain (FDTD) simulations. Experimental reflectivities up to 78% are observed.
PB SPIE
SN 978-1-5106-2481-8
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/14017
UL https://hdl.handle.net/20.500.14352/14017
LA eng
NO © 2019 SPIEISSN: 0277-786XConference on Oxide-Based Materials and Devices(10. 2019. San Francisco) The authors are grateful for the financial support from the MINECO (Projects No. MAT-2015-65274-R-FEDER and PCIN-2017-106). M. A.-O. acknowledges financial support from MICINN (FPU Contract No. FPU15/01982).
NO Ministerio de Economia y Competitividad (MINECO)/FEDER
NO Ministerio de Ciencia e Innovación (MICINN)
DS Docta Complutense
RD 23 abr 2025