Table 1 Physical laser parameters used for simulation of the vortex VECSEL dynamics, w/o Spiral Phase Metasurface.
Parameters | Value | Units | Description |
|---|---|---|---|
γ = 2πfcc | 2108 | s −1 | Photon decay rate |
B | 0.7 | s −1 | Einstein coefficient for stimulated emission |
A | 5108 | s −1 | Carrier relaxation rate |
α | 3 | Phase-amplitude coupling factor | |
ω 21 | 0 or 1.25108 | s −1 | Frequency separation of counter-rotating vortex mode |
L g | 12 × 8 | nm | Gain thickness |
L c | 9.5 | mm | Optical cavity length |
w 0 | 25 | μm | LG00 fundamental beam waist |
γ b | 5.10−6γ | s −1 | Backscattering amplitude |
μ | π | rad | Backscattering phase |
ρ(r,θ) |
| s −1 m −3 | Pump distribution in the QWs |
η | 1 to 2 | Pump rate normalized to threshold | |
w p | 45 | μm | Pump spot radius @1/e2 |
| 0 | s −1 | Random Langevin forces for the electric field of ith mode (mean value) |
| ξγδ(t − t′)δij | s −2 | Random Langevin force variance |
ξ | 1.2 | Spontaneous emission to stimulated emission ratio (reduced to one photon) |
