## Detuning-dependent Mollow triplet of a coherently-driven single quantum dot |

Optics Express, Vol. 21, Issue 4, pp. 4382-4395 (2013)

http://dx.doi.org/10.1364/OE.21.004382

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### Abstract

We present both experimental and theoretical investigations of a laser-driven quantum dot (QD) in the dressed-state regime of resonance fluorescence. We explore the role of phonon scattering and pure dephasing on the detuning-dependence of the Mollow triplet and show that the triplet sidebands may spectrally broaden or narrow with increasing detuning. Based on a polaron master equation approach, which includes electron-phonon interaction nonperturbatively, we derive a fully analytical expression for the spectrum. With respect to detuning dependence, we identify a crossover between the regimes of spectral sideband narrowing or broadening. We also predict regimes of phonon-induced squeezing and anti-squeezing of the spectral resonances. A comparison of the theoretical predictions to detailed experimental studies on the laser detuning-dependence of Mollow triplet resonance emission from single In(Ga)As QDs reveals excellent agreement.

© 2013 OSA

**OCIS Codes**

(270.0270) Quantum optics : Quantum optics

(300.6320) Spectroscopy : Spectroscopy, high-resolution

(300.6470) Spectroscopy : Spectroscopy, semiconductors

**ToC Category:**

Quantum Optics

**History**

Original Manuscript: October 10, 2012

Revised Manuscript: January 11, 2013

Manuscript Accepted: January 11, 2013

Published: February 13, 2013

**Citation**

Ata Ulhaq, Stefanie Weiler, Chiranjeeb Roy, Sven Marcus Ulrich, Michael Jetter, Stephen Hughes, and Peter Michler, "Detuning-dependent Mollow triplet of a coherently-driven single quantum dot," Opt. Express **21**, 4382-4395 (2013)

http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-4-4382

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