Photonic quantum ring laser of 3D whispering cave mode

Photonic quantum ring flower laser of whispering cave mode

“…2a, is apparently smaller than the threshold range around 20 -30 A/cm 2 as estimated via the usual extrapolation schemes from Fig. 3a, where the convex TIR effect of 'hole' PQR portions involved in addition to the 'soft lasing turn-on' behaviour [2,4] is detailed elsewhere. The PQR's Rayleigh band region shines much earlier and brighter than the central LED region, which indicates the very low threshold and high emission efficiency of the PQR laser.…”

“…When vertical mesa cavities are made of l/4 Al 0.92 Ga 0.08 As/Al 0.16 Ga 0.84 As distributed Bragg reflector (DBR) structures added below and above an active region of three quantum wells (QWs) of 7 nm-thick GaAs each separated by 8 nm-thick barriers of Al 0.3 Ga 0.7 As, nearly total internal reflections (TIRs) in a three-dimensional (3D) manner can create 3D whispering cave modes (WCMs) for PQR lasers [3]. Moreover, we have observed unusual convex WCMs from reverse-mesa (¼hole)-type micro-resonators, whose WCMs we interpreted with respect to gain-guiding and photonic quantum corral effects [2,4]. Based on the concave and convex WCM properties of the PQR, we have further demonstrated a new type of optical encoder operating through s-and p-polarisation switchings of a zigzag-shaped PQR laser [5], the 3D polarisation states of light from which were analysed in [6].…”

Photonic Quantum Ring Laser of Whispering Cave Mode

“…The images of several standing light-wave-like carrier distribution patterns within a 1 micron wide quantum well stripe emerge, as a function of time from-5-to-8 psec after about 5 psec chaotic regime as indicated along the horizontal time axis of 10 psec full range, shown in Fig. 6 ( Kwon et al, 2009). They are curiously reminiscent of the tangled web of the 2D electron gas due to impurity atom potentials studied by a Harvard group (Topinka et al, 2003).…”