TY  - JOUR
A1  - Holzinger, Steffen
A1  - Schneider, Christian
A1  - Höfling, Sven
A1  - Porte, Xavier
A1  - Reitzenstein, Stephan
T1  - Quantum-dot micropillar lasers subject to coherent time-delayed optical feedback from a short external cavity
T2  - Scientific Reports
N2  - We investigate the mode-switching dynamics of an electrically driven bimodal quantum-dot micropillar laser when subject to delayed coherent optical feedback from a short external cavity. We experimentally characterize how the external cavity length, being on the same order than the microlaser’s coherence length, influences the spectral and dynamical properties of the micropillar laser. Moreover, we determine the relaxation oscillation frequency of the micropillar by superimposing optical pulse injection to a dc current. It is found that the optical pulse can be used to disturb the feedback-coupled laser within one roundtrip time in such a way that it reaches the same output power as if no feedback was present. Our results do not only expand the understanding of microlasers when subject to optical feedback from short external cavities, but pave the way towards tailoring the properties of this key nanophotonic system for studies in the quantum regime of self-feedback and its implementation to integrated photonic circuits.
KW  - nanophotonics and plasmonics
KW  - photonic devices
KW  - quantum dots
KW  - semiconductor lasers
Y1  - 2019
UR  - https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/32248
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-322485
VL  - 9
ER  -