Demonstration of critical coupling in an active III-nitride microdisk photonic circuit on silicon - Archive ouverte HAL Access content directly
Journal Articles Scientific Reports Year : 2019

Demonstration of critical coupling in an active III-nitride microdisk photonic circuit on silicon

Christelle Brimont
Thierry Guillet
Xavier Checoury
  • Function : Author
  • PersonId : 1042674
Bruno Gayral

Abstract

On-chip microlaser sources in the blue constitute an important building block for complex integrated photonic circuits on silicon. We have developed photonic circuits operating in the blue spectral range based on microdisks and bus waveguides in III-nitride on silicon. We report on the interplay between microdisk-waveguide coupling and its optical properties. We observe critical coupling and phase matching, i.e. the most efficient energy transfer scheme, for very short gap sizes and thin waveguides (g = 45 nm and w = 170 nm) in the spontaneous emission regime. Whispering gallery mode lasing is demonstrated for a wide range of parameters with a strong dependence of the threshold on the loaded quality factor. We show the dependence and high sensitivity of the output signal on the coupling. Lastly, we observe the impact of processing on the tuning of mode resonances due to the very short coupling distances. Such small footprint on-chip integrated microlasers providing maximum energy transfer into a photonic circuit have important potential applications for visible-light communication and lab-on-chip bio-sensors.
Fichier principal
Vignette du fichier
Critical_coupling_hal.pdf (3.32 Mo) Télécharger le fichier
Origin Files produced by the author(s)
Loading...

Dates and versions

hal-02393815 , version 1 (04-12-2019)

Identifiers

Cite

Farsane Tabataba-Vakili, Laetitia Doyennette, Christelle Brimont, Thierry Guillet, Stephanie Rennesson, et al.. Demonstration of critical coupling in an active III-nitride microdisk photonic circuit on silicon. Scientific Reports, 2019, 9, pp.18095. ⟨10.1038/s41598-019-54416-3⟩. ⟨hal-02393815⟩
111 View
128 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More