Yb:YAG laser system

硅是我们电子、计算和通信技术的支柱，直到最近，它只能作为三种稳定同位素的混合物：28^Si、29^Si和30^Si。它也是原型和最完美的半导体材料，因此，许多半导体物理学和光谱学都是使用Si发展和完善的。我们的团队意外地发现，与Si中杂质相关的许多光学跃迁的线宽已经非常窄，实际上受到普通“天然”Si中不均匀同位素加宽的限制，并且这些跃迁在高度富集的28^Si中尖锐十倍以上，这很快导致了许多令人惊讶的发现和潜在的新应用。特别是，发现31^P施主的核自旋和电子自旋耦合产生的微小超精细分裂可以在28^Si的施主束缚激子跃迁中很好地解决，这导致了单原子探测，量子计算和量子信息系统中的许多潜在应用。

Silicon is the mainstay of our electronics, computing and communications technologies, and until recently it was only available as a mixture of the three stable isotopes: 28^Si, 29^Si and 30^Si. It is also the prototypical and most perfect semiconductor material, and as a result much of semiconductor physics and spectroscopy was developed and perfected using Si. The unexpected discovery by our group that the already very narrow linewidths of many of the optical transitions associated with impurities in Si were in fact limited by inhomogeneous isotope broadening in ordinary 'natural' Si, and that these transitions were more than ten times sharper in highly enriched 28^Si, quickly led to a number of surprising discoveries and potential new applications. In particular, the discovery that the tiny hyperfine splitting resulting from the coupling of the nuclear and electronic spins of the 31^P donor could be well resolved in the donor bound exciton transition in 28^Si has led to a number of potential applications in single atom detection, quantum computing and quantum information systems.