title: High-brightness semipolar (2021¯) blue InGaN/GaN superluminescent diodes for droop-free solid-state lighting and visible-light communications.
abstract: A high-brightness, droop-free, and speckle-free InGaN/GaN quantum well blue superluminescent diode (SLD) was demonstrated on a semipolar (2021¯) GaN substrate. The 447-nm emitting SLD has a broad spectral linewidth of 6.3 nm at an optical power of 123 mW. A peak optical power of 256 mW was achieved at 700 mA CW injection current. By combining YAG:Ce phosphor, SLD-generated white light shows a color-rendering index (CRI) of 68.9 and a correlated color temperature (CCT) of 4340 K. The measured frequency response of the SLD revealed a -3  dB bandwidth of 560 MHz, thus demonstrating the feasibility of the device for both solid-state lighting (SSL) and visible-light communication (VLC) applications.
authors.forename: Chao
authors.initials: C
authors.lastname: Shen
authors.forename: Tien Khee
authors.initials: TK
authors.lastname: Ng
authors.forename: John T
authors.initials: JT
authors.lastname: Leonard
authors.forename: Arash
authors.initials: A
authors.lastname: Pourhashemi
authors.forename: Shuji
authors.initials: S
authors.lastname: Nakamura
authors.forename: Steven P
authors.initials: SP
authors.lastname: DenBaars
authors.forename: James S
authors.initials: JS
authors.lastname: Speck
authors.forename: Ahmed Y
authors.initials: AY
authors.lastname: Alyamani
authors.forename: Munir M
authors.initials: MM
authors.lastname: El-Desouki
authors.forename: Boon S
authors.initials: BS
authors.lastname: Ooi