Dynamical Properties of Nanolasers Based on Few Discrete Emitters

Anders Mølbjerg Lund, Per Kær Nielsen, Michael Lorke, Bjarne Tromborg, Jesper Mørk

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We investigate the dynamical properties of nanolasers comprising a few two-level emitters coupled to an optical cavity. A set of rate equations is derived, and is shown to agree very well with a solution of the full master equation model. Using a linearized version of these rate equations, we can analytically express the response of the nanolaser to a modulation of the pumping rate. These results are compared with the modulation response obtained directly from the master equation using a novel method. We show that contrary to conventional semiconductor lasers, the nanolaser is typically over-damped and displays a dip in the modulation bandwidth as the two-level systems become inverted. Both these features can be traced back to the use of discrete emitters that are incoherently pumped.
Original languageEnglish
JournalI E E E Journal of Quantum Electronics
Volume49
Issue number11
Pages (from-to)945-954
ISSN0018-9197
DOIs
Publication statusPublished - 2013

Keywords

  • Laser theory
  • Quantum dot lasers
  • Atom lasers
  • Nanoscale devices

Cite this

Lund, Anders Mølbjerg ; Nielsen, Per Kær ; Lorke, Michael ; Tromborg, Bjarne ; Mørk, Jesper. / Dynamical Properties of Nanolasers Based on Few Discrete Emitters. In: I E E E Journal of Quantum Electronics. 2013 ; Vol. 49, No. 11. pp. 945-954.
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abstract = "We investigate the dynamical properties of nanolasers comprising a few two-level emitters coupled to an optical cavity. A set of rate equations is derived, and is shown to agree very well with a solution of the full master equation model. Using a linearized version of these rate equations, we can analytically express the response of the nanolaser to a modulation of the pumping rate. These results are compared with the modulation response obtained directly from the master equation using a novel method. We show that contrary to conventional semiconductor lasers, the nanolaser is typically over-damped and displays a dip in the modulation bandwidth as the two-level systems become inverted. Both these features can be traced back to the use of discrete emitters that are incoherently pumped.",
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Dynamical Properties of Nanolasers Based on Few Discrete Emitters. / Lund, Anders Mølbjerg; Nielsen, Per Kær; Lorke, Michael; Tromborg, Bjarne; Mørk, Jesper.

In: I E E E Journal of Quantum Electronics, Vol. 49, No. 11, 2013, p. 945-954.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Dynamical Properties of Nanolasers Based on Few Discrete Emitters

AU - Lund, Anders Mølbjerg

AU - Nielsen, Per Kær

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AU - Tromborg, Bjarne

AU - Mørk, Jesper

PY - 2013

Y1 - 2013

N2 - We investigate the dynamical properties of nanolasers comprising a few two-level emitters coupled to an optical cavity. A set of rate equations is derived, and is shown to agree very well with a solution of the full master equation model. Using a linearized version of these rate equations, we can analytically express the response of the nanolaser to a modulation of the pumping rate. These results are compared with the modulation response obtained directly from the master equation using a novel method. We show that contrary to conventional semiconductor lasers, the nanolaser is typically over-damped and displays a dip in the modulation bandwidth as the two-level systems become inverted. Both these features can be traced back to the use of discrete emitters that are incoherently pumped.

AB - We investigate the dynamical properties of nanolasers comprising a few two-level emitters coupled to an optical cavity. A set of rate equations is derived, and is shown to agree very well with a solution of the full master equation model. Using a linearized version of these rate equations, we can analytically express the response of the nanolaser to a modulation of the pumping rate. These results are compared with the modulation response obtained directly from the master equation using a novel method. We show that contrary to conventional semiconductor lasers, the nanolaser is typically over-damped and displays a dip in the modulation bandwidth as the two-level systems become inverted. Both these features can be traced back to the use of discrete emitters that are incoherently pumped.

KW - Laser theory

KW - Quantum dot lasers

KW - Atom lasers

KW - Nanoscale devices

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