Extraction of inhomogeneous broadening and nonradiative losses in InAs quantum-dot lasers

Chow, Weng W.; Liu, Alan Y.; Gossard, Arthur C.; Bowers, John E.

doi:10.1063/1.4934838

Extraction of inhomogeneous broadening and nonradiative losses in InAs quantum-dot lasers

Journal Article · Wed Oct 28 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4934838· OSTI ID:1235538

Chow, Weng W. ^[1]; Liu, Alan Y. ^[2]; Gossard, Arthur C. ^[2]; Bowers, John E. ^[2]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Univ. of California, Santa Barbara, CA (United States)

We present a method to quantify inhomogeneous broadening and nonradiative losses in quantum dot lasers by comparing the gain and spontaneous emission results of a microscopic laser theory with measurements made on 1.3 μm InAs quantum-dot lasers. Calculated spontaneous-emission spectra are first matched to those measured experimentally to determine the inhomogeneous broadening in the experimental samples. This is possible because treatment of carrier scattering at the level of quantum kinetic equations provides the homogeneously broadened spectra without use of free parameters, such as the dephasing rate. Thus we then extract the nonradiative recombination current associated with the quantum-dot active region from a comparison of measured and calculated gain versus current relations.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1235538

Alternate ID(s):: OSTI ID: 22485958

Report Number(s):: SAND--2016-0273J; 618406

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 17 Vol. 107; ISSN APPLAB; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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