Superradiance dynamics in semiconductor laser diode structures

Abstract

We analyze theoretically the superradiant emission (SR) in semiconductor edge-emitting laser heterostructures using InGaN/GaN heterostructure quantum well (QW) as a model system. The generation of superradiant pulses as short as 500 fs at peak powers of over 200 W has been predicted for InGaN/GaN heterostructure QWs with the peak emission in the blue/violet wavelength range. Numerical simulations based on semiclassical traveling wave Maxwell-Bloch equations predict building up of macroscopic coherences in the ensemble of electrons and holes during SR pulse formation. We show that SR is covered by the Ginzburg-Landau equation for a phase transition to macroscopically coherent state of matter. The presented theory is applicable to other semiconductor materials.

Superfluorescent 1.1 ps pulse-on-demand generation in InGaN laser

“…Each realization observed on a single-shot streak camera is unique. Fig 1 (b) shows recorded spectrochronogram with deconvolved pulse width below 1.1ps (the streak camera resolution is 2 ps) and pulse pedestal being shorter than the cavity roundtrip time, in agreement with numerical simulations [1,2]. Interestingly, the generated pulses ( Fig.1(b)) drastically differ from intensity spiking caused by multiple roundtrips in the cavity seen in Ref [3].…”

Multimode RNGH instabilities of Fabry-Pérot cavity QCLs: impact of diffusion

“…The green curve shows that one for X SHB . The frequency is normalized to longitudinal mode spacing of 11.4 GHz plot the system attractor which traces the evolution of normalized medium polarization P versus normalized carrier density N. Both P and N values are normalized at transparency carrier density (see Boiko and Vasil'ev 2012 for further details). The P-N attractor has a characteristic butterfly shape that is typical for chaotic behavior in a Lorenz-type system.…”

“…Indeed, the normalization of variables P and N that we apply here follows the Ref. (Boiko and Vasil'ev 2012). It is such that P measures the order parameter for the system.…”

Superradiant Lasing and Collective Dynamics of Active Centers with Polarization Lifetime Exceeding Photon Lifetime

“…The presence of inhomogeneities of a medium or a pumping in a laser cavity and, moreover, the presence of different active or passive media taking part in the resonance interaction via the self-consistent electromagnetic field may lead to new unexpected dynamical consequences and practical applications (cf., e.g., [2,9,26,41]). …”