Abstract
We report novel measurements of the room temperature refractive optical nonlinearities in a molecular beam epitaxy-grown ZnSe epilayer at frequencies near to the band edge. Time-resolved changes in the transmission spectrum due to a two-photon generated plasma of free carriers are monitored with a broad-band white-light continuum probe. The refractive index changes, measured for photon energies between 0.8 and 0.05 eV below the free-exciton line at 2.68 eV, with photoexcited carrier densities of (2-5)×1018 cm-3, are found to be in good agreement with a many-body plasma calculation.
| Original language | English |
|---|---|
| Pages (from-to) | 709-711 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 63 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1993 |