The exciton absorption resonaces (HH and LH) and step accumu-tive density Of state have been observed.
观察到轻、重空穴对应的激子吸收峰（LH和HH）及台阶状态密度。
2
When the exciton system closes to the statistical equilibrium, this exciton state density automatically approaches to the Fermi-gas nuclear level density with angular momentum.
当激子系统趋近统计平衡时，该公式就自动过渡到具有角动量的费米气能级密度公式。
3
The enhancement of efficiency is attributed to high density of exciton due to confinement of EBL.