Abstract

In this Letter, we report optical confinement in the near-ultraviolet (near-UV) range in ${{\rm Ga}_2}{{\rm O}_3}$ nanowires (NWs) by distributed Bragg reflector (DBR) nanopatterned cavities. High-contrast DBRs, which act as the end mirrors of the cavities of the desired length, are designed and fabricated by focused ion beam etching. The resonant modes of the cavities are analyzed by micro-photoluminescence measurements, analytical models, and simulations, which show very good agreement between each other. Experimental reflectivities up to 50% are obtained over the 350–410 nm region for the resonances in this wavelength range. Therefore, ${{\rm Ga}_2}{{\rm O}_3}$ NW optical cavities are shown as good candidates for single-material-based near-UV light emitters.

© 2021 Optical Society of America

2 µm lasing from Tm³⁺-doped PbO-PbF₂-Bi₂O₃-Ga₂O₃ glass microspheres

Jin Yu, Yanqiu Du, Xiaotong Zhao, Shijie Jia, Zhenrui Li, Shunbin Wang, and Pengfei Wang
Opt. Lett. 46(20) 5084-5087 (2021)

Eu³⁺-doped Bi₂MoO₆ phosphors for highly sensitive and visible H₂S gas indicator material: optical and color properties, and gas sensing performance

Tae Wook Kang, Young Ji Park, Gyu Jin Jeong, Byungseo Bae, and Sun Woog Kim
Opt. Lett. 46(13) 3231-3234 (2021)

High-power narrow spectrum GaSb-based DBR lasers emitting near 2.1 µm

Jiang Jiang, Leon Shterengas, Gela Kipshidze, Aaron Stein, Alexey Belyanin, and Gregory Belenky
Opt. Lett. 46(8) 1967-1970 (2021)

Thermo-optical properties of terbium sesquioxide (Tb₂O₃) ceramics at room temperature

Ilya Snetkov, Alexey Yakovlev, Aleksey Starobor, Stanislav Balabanov, Dmitry Permin, Elena Rostokina, and Oleg Palashov
Opt. Lett. 46(15) 3592-3595 (2021)

Self-powered solar-blind detector array based on ε-Ga₂O₃ Schottky photodiodes for dual-mode binary UV communication

Kanglong Xia, Zeng Liu, Shulin Sha, Zhaoying Xi, Jia-Han Zhang, Mingming Jiang, Yufeng Guo, and Weihua Tang
Opt. Lett. 48(24) 6384-6387 (2023)