All-silicon polarized light source based on electrically excited whispering gallery modes in inversely tapered photonic resonators
Schmitt SW, Schwarzburg K, Sarau G, Christiansen SH, Wiesner S, Dubourdieu C (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 8
Article Number: 061110
Journal Issue: 6
DOI: 10.1063/5.0007759
Abstract
As a result of its indirect bandgap, emitting photons from silicon in an efficient way remains challenging. Silicon light emitters that can be integrated seamlessly on a CMOS platform have been demonstrated; however, none satisfies an ensemble of key requirements such as a small footprint, room-temperature operation at low voltages, and emission of narrow and polarized lines with a high spectral power density in the near-infrared range. Here, we present an all-silicon electrically driven light emitting diode that consists of an inversely tapered half-ellipsoidal silicon photonic resonator containing a p-n junction used to excite whispering gallery modes (WGMs) inside the resonator. Under low voltage operation at room temperature, such a photonic silicon light-emitting diode exhibits a band-edge emission (900-1300 nm) with a wall-plug efficiency of 10-4. The emitted spectrum is amplified in multiple WGMs and shows peaks that are polarized and have linewidths Δλ as narrow as 0.33 nm and spectral power densities as high as 8 mW cm-2 nm-1. Considering its small footprint of ∼1 μm and remarkable emission characteristics, this silicon light source constitutes a significant step ahead toward fully integrated on-chip silicon photonics.
Involved external institutions
Germany (DE)How to cite
APA:
Schmitt, S.W., Schwarzburg, K., Sarau, G., Christiansen, S.H., Wiesner, S., & Dubourdieu, C. (2020). All-silicon polarized light source based on electrically excited whispering gallery modes in inversely tapered photonic resonators. APL Materials, 8(6). https://dx.doi.org/10.1063/5.0007759
MLA:
Schmitt, Sebastian W., et al. "All-silicon polarized light source based on electrically excited whispering gallery modes in inversely tapered photonic resonators." APL Materials 8.6 (2020).
BibTeX: Download