Descriptions of neurocranium morphology in 34 species of moray eels (Muraenidae) found in Taiwan

Ramos-Castro, Marites, Chen, Hong-Ming, Mao, Bo-Syun (2020): Descriptions of neurocranium morphology in 34 species of moray eels (Muraenidae) found in Taiwan. Zootaxa 4810 (1): 81-109, DOI: https://doi.org/10.11646/zootaxa.4810.1.

GaN/AlGaN ultraviolet light-emitting diode with an embedded porous-AlGaN distributed Bragg reflector

A GaN/AlGaN-based ultraviolet light-emitting diode (LED) structure with an embedded porous-AlGaN reflector was fabricated by a doping-selective electrochemical (EC) wet-etching process. The n+-AlGaN/undoped-AlGaN (u-AlGaN) stack structures with different Al contents were transformed into porous-AlGaN/u-AlGaN stack structures that acted as the embedded distributed Bragg reflectors (DBRs). The porosity of the EC-treated AlGaN layer was increased by decreasing the Al content in the n+-AlGaN layer. The reflectivity of the porous-AlGaN DBR structure was measured to be 90% at 379.3 nm with a 37.2 nm stopband width. The photoluminescence emission intensity of the DBR-LED was enhanced by forming the embedded porous-AlGaN DBR structure