Ground-state modulation-enhancement by two-state lasing in quantum-dot laser devices

Journal Article · Mon May 11 04:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4921173· OSTI ID:22399030

Röhm, André; Lingnau, Benjamin ^[1]; Lüdge, Kathy ^[2]

---

1. Institut für Theoretische Physik, Technische Universität Berlin, 10623 Berlin (Germany)
2. Fachbereich Physik, Freie Universität Berlin, 14195 Berlin (Germany)

We predict a significant increase of the 3 dB-cutoff-frequency on the ground-state lasing wavelength for two-state-lasing quantum-dot lasers using a microscopically motivated multi-level rate-equation model. After the onset of the second lasing line, the excited state acts as a high-pass filter, improving the ground-state response to faster modulation frequencies. We present both numerically simulated small-signal and large-signal modulation results and compare the performance of single and two-state lasing devices. Furthermore, we give dynamical arguments for the advantages of two-state lasing on data-transmission capabilities.

• OSTI ID: 22399030
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 19 Vol. 106; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
COMPARATIVE EVALUATIONS
DATA TRANSMISSION
EXCITED STATES
FILTERS
GROUND STATES
LASERS
MODULATION
PERFORMANCE
QUANTUM DOTS
REACTION KINETICS
WAVELENGTHS