Physics – Quantum Physics
Scientific paper
1998-04-22
Phys.Rev. A57 (1998) 3074
Physics
Quantum Physics
10 pages, 8 figures
Scientific paper
10.1103/PhysRevA.57.3074
From the microscopic quantum Langevin equations (QLEs) we derive the effective semiconductor QLEs and the associated noise correlations which are valid at a low-injection level and in real devices. Applying the semiconductor QLEs to semiconductor light-emitting devices (LEDs), we obtain a new formula for the Fano factor of photons which gives the photon-number statistics as a function of the pump statistics and several parameters of LEDs. Key ingredients are non-radiative processes, carrier-number dependence of the radiative and non-radiative lifetimes, and multimodeness of LEDs. The formula is applicable to the actual cases where the quantum efficiency $\eta$ differs from the differential quantum efficiency $\eta_{d}$, whereas previous theories implicitly assumed $\eta = \eta_{d}$. It is also applicable to the cases when photons in each mode of the cavity are emitted and/or detected inhomogeneously. When $\eta_{d} < \eta$ at a running point, in particular, our formula predicts that even a Poissonian pump can produce sub-Poissonian light. This mechanism for generation of sub-Poissonian light is completely different from those of previous theories, which assumed sub-Poissonian statistics for the current injected into the active layers of LEDs. Our results agree with recent experiments. We also discuss frequency dependence of the photon statistics.
Fujisaki Hiroshi
Shimizu Akira
No associations
LandOfFree
Quantum Langevin equations for semiconductor light-emitting devices and the photon statistics at a low-injection level does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum Langevin equations for semiconductor light-emitting devices and the photon statistics at a low-injection level, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum Langevin equations for semiconductor light-emitting devices and the photon statistics at a low-injection level will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-474304