Dynamical Tuning of Nanowire Lasing Spectra

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Realizing visionary concepts of integrated photonic circuits, nanospectroscopy, and nanosensing will tremendously benefit from dynamically tunable coherent light sources with lateral dimensions on the subwavelength scale. Therefore, we demonstrate an individual nanowire laser based device which can be gradually tuned by reversible length changes of the nanowire such that uniaxial tensile stress is applied to the respective semiconductor gain material. By straining the device, the spontaneous excitonic emission of the nanowire shifts to lower energies caused by the bandgap reduction of the semiconductor. Moreover, the optical gain spectrum of the nanolaser can be precisely strain-tuned in the high excitation regime. The tuning of the emission does not affect the laser threshold of the device, which is very beneficial for practical applications. The applied length change furthermore adjusts the laser resonances inducing a redshift of the longitudinal modes. Thus, this concept of gradually and dynamically tunable nanolasers enables controlling and modulating the coherent emission on the nanoscale without changing macroscopic ambient conditions. This concept holds therefore huge impact on nanophotonic switches and photonic circuit technology.

Detaljer

Författare
  • Maximilian Zapf
  • Robert Röder
  • Karl Winkler
  • Lisa Kaden
  • Johannes Greil
  • Marcel Wille
  • Marius Grundmann
  • Rüdiger Schmidt-Grund
  • Alois Lugstein
  • Carsten Ronning
Enheter & grupper
Externa organisationer
  • Friedrich Schiller University Jena
  • Vienna University of Technology
  • Leipzig University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Nanoteknik

Nyckelord

Originalspråkengelska
Sidor (från-till)6637-6643
Antal sidor7
TidskriftNano Letters
Volym17
Utgivningsnummer11
StatusPublished - 2017 nov 8
PublikationskategoriForskning
Peer review utfördJa