Extreme nonlinearities in InAs/InP nanowire gain media: The two-photon induced laser

Amir Capua*, Ouri Karni, Gadi Eisenstein, Johann Peter Reithmaier, Kresten Yvind

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We demonstrate a novel laser oscillation scheme in an InAs / InP wire-like quantum dash gain medium. A short optical pulse excites carriers by two photon absorption which relax to the energy levels providing gain thereby enabling laser oscillations. The nonlinear dynamic interaction is analyzed and quantified using multi-color pump-probe measurements and shows a highly efficient nonlinear two photon excitation process which is larger by more than an order of magnitude compared to common quantum well and bulk gain media. The dynamic response of the nonlinearly induced laser line is characterized by spectrally resolved temporal response measurements, while changes incurring upon propagation in the stimulating short pulse itself are characterized by frequency resolved optical gating (FROG).

Original languageAmerican English
Pages (from-to)5987-5992
Number of pages6
JournalOptics Express
Issue number6
StatePublished - 12 Mar 2012
Externally publishedYes


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