Photoluminescence study of the annihilation process of donor-bound excitons in ZnO:observation of qu

• 作 者: 施申蕾 黄腾超
• 机 构: Department of Physics,China Jiliang University,Department of Information Science and Electronic Engi
• 出 处: Chinese Optics Letters
• 发表日期: 2010年07期
• 关键词: donor phonon longitudinal exciton asymmetric lasing pumped mirror resonant termi

We report a photoluminescence observation of the coupling of donor-bound excitons and longitudinal optical phonons in high-quality ZnO crystals at 5 K.The first-order phonon Stockes line of donor-bound excitons exhibits a distinct asymmetric line shape with a clear dip at its higher energy side,suggesting that quantum mechanical interference occurs during the annihilation of donor-bound excitons.The donor binding energy is determined to be 49.3 meV from spectral featural.

We report a photoluminescence observation of the coupling of donor-bound excitons and longitudinal optical phonons in high-quality ZnO crystals at 5 K. The first-order phonon Stocks line of donor-bound excitons exhibits a distinct asymmetric line shape with a clear dip at its higher energy side, suggesting that quantum mechanical interference occurs during the annihilation of donor-bound excitons. The donor binding energy is determined to be 49.3 meV from spectral featural.