Abstract
We report the observation of an exciton redshift with a below-gap laser beam, linked to the presence of a bound two-pair state in CuCl. This change in the shift direction for the optical Stark effect in semiconductors relies upon the predominant creation of virtual biexcitons, as shown by the polarization selection rules. Our experiment demonstrates the importance of the biexciton in the description of the optical Stark effect.
| Original language | English |
|---|---|
| Pages (from-to) | 3425-3428 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 65 |
| Issue number | 27 |
| DOIs | |
| Publication status | Published - 1 Jan 1990 |