Induced coherent macroscopic states of excitons and biexcitons in a microcavity-embedded Zn1−xCdxSe-type quantum well
✍ Scribed by A.I. Bobrysheva; S.A. Moskalenko; S.S. Russu
- Book ID
- 104429627
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 115 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1386-9477
No coin nor oath required. For personal study only.
✦ Synopsis
The conditions of induced and spontaneous Kosterlitz-Thouless-type Bose-Einstein condensation (BEC) of excitons and biexcitons in a microcavity-embedded quantum well are discussed. As an example the Zn1-xCdxSe=ZnSe quantum well is considered, where the HH-exciton electronic structure consisting of four types of excitons -E(x), E(y), A1, A2 is taken into account. A polarized strong pump pulse with the frequency in the polariton region induces the BEC of polaritons and biexcitons. The biexciton is formed from the above-mentioned four types of excitons. The coherent polariton and biexciton concentration were obtained. It was proved that if the cavity photon mode E ph (0) is below the exciton resonance Eex(0), the biexciton is always polarized. If E ph (0) ¿ Eex(0) and the pump frequency is in the electron-hole transition region, optical nonactive A1, A2 HH-excitons can be accumulated and spontaneous Kosterlitz-Thouless-type BEC of biexcitons and "dark" excitons can occur.