| Autor: |
A. Villeneuve, G.I. Stegeman, G. Scelsi, C.N. Ironside, J.S. Aitchison, J.T. Boyd |
| Rok vydání: |
1991 |
| Zdroj: |
Nonlinear Guided-Wave Phenomena. |
| DOI: |
10.1364/nlgwp.1991.tuc2 |
| Popis: |
The utility of the ultrafast nonlinearity in semiconductor waveguides operated below the band gap is limited by two photon absorption β (α = βI where I is the intensity) which does not allow a nonlinear 2π phase shift over one absorption length. [1] However, the two photon coefficient should be zero below half the band gap, potentially allowing for all-optical device operation there.[2,3] Here we report the first measurements of two photon absorption in GaAs waveguides in the vicinity of half the band gap. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
