...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Ultrafast band-gap renormalization and build-up of optical gain in monolayer MoTe_2
【24h】

Ultrafast band-gap renormalization and build-up of optical gain in monolayer MoTe_2

机译：单层MoTe_2中的超快带隙重归一化和光学增益的建立

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The dynamics of band-gap renormalization and gain build-up in monolayer MoTe_2-H is investigated by evaluating the nonequilibrium Dirac-Bloch equations with the incoherent carrier-carrier and carrier-phonon scattering treated via quantum-Boltzmann type scattering equations. For the case where an approximately 300-fs-long high-intensity optical pulse generates charge-carrier densities in the gain regime, the strong Coulomb coupling leads to a relaxation of excited carriers on a few-femtosecond timescale. The pump-pulse generation of excited carriers induces a large band-gap renormalization during the timcscale of the pulse. Efficient phonon coupling leads to a subsequent carrier thermalization within a few picoseconds, which defines the timescale for the optical gain build-up energetically close to the low-density exciton resonance.
机译：通过对非平衡Dirac-Bloch方程进行了非平衡的Dirac-Bloch方程评估，并通过量子-玻尔兹曼型散射方程对载流子和载子-声子进行了散射，研究了单层MoTe_2-H中带隙重归一化和增益累积的动力学。对于大约300 fs长的高强度光脉冲在增益范围内产生电荷载流子密度的情况，强大的库仑耦合导致在几飞秒的时间尺度上激发的载流子弛豫。激发的载流子的泵浦脉冲产生在脉冲的时标范围内引起大的带隙重归一化。高效的声子耦合会在几皮秒内导致随后的载流子热化，从而使光增益累积的时间尺度从能量上接近低密度激子共振。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号