论文标题
使用Terahertz光谱研究，研究原始钻石中的激子和自由载体之间的详细平衡
Study of detailed balance between excitons and free carriers in pristine diamond using terahertz spectroscopy
论文作者
论文摘要
对钻石的光激发载体系统的基本理解对于促进其在光子和电子设备中的应用至关重要。在这里，我们通过使用深层粉状泵（DUV）泵与Terahertz（THZ）探针光谱相结合，研究了原始钻石中自由载体和激子之间的详细平衡。我们研究了光激发载体通过激子的内部过渡的转化，新发现的发生在大约15 thz的频率下。我们根据在化学平衡下测得的自由载体密度的温度依赖性确定了SAHA方程中的平衡常数。派生的激子结合能大于常规值，这表明由于激子状态的精细结构分裂而导致能量转移。
A fundamental understanding of the photoexcited carrier system in diamond is crucial to facilitate its application in photonic and electronic devices. Here, we studied the detailed balance between free carriers and excitons in pristine diamond by using a deep-ultraviolet (DUV) pump in combination with terahertz (THz) probe spectroscopy. We investigated the transformation of photoexcited carriers to excitons via an internal transition of excitons, which was newly found to occur at a frequency of approximately 15 THz. We determined the equilibrium constant in the Saha equation from the temperature dependence of the free-carrier density measured at chemical equilibrium. The derived exciton binding energy was larger than the conventional value, which indicated an energy shift due to the fine-structure splitting of the exciton states.
