论文标题
含有化学计量稀土离子的介电晶体中的负折射率
Negative refractive index in dielectric crystals containing stoichiometric rare-earth ions
论文作者
论文摘要
我们研究了在含有化学计量稀土离子的介电晶体中获得负介电常数和渗透率的前景。我们使用简化的非相互作用偶极子模型得出了必要的过渡线宽，离子密度以及电磁振荡器的强度。我们在磁性秩序的相中识别Erbium晶体是满足这些条件的最有前途的材料，并描述了两个潜在候选物的初始光学测量值，即\ ercl {}和$ {}^7 $ \ lierf {}，分别显示3〜GHz和250〜MHz的线路。 $ {}^7 $ \ lierf {}的属性满足了我们对负渗透性的标准。
We investigate the prospect of achieving negative permittivity and permeability at optical frequencies in a dielectric crystal containing stoichiometric rare-earth ions. We derive the necessary transition linewidth, ion density and electric and magnetic oscillator strengths using a simplified model of non-interacting dipoles. We identify Erbium crystals in a magnetically ordered phase as the most promising material to meet these conditions, and describe initial optical measurements of two potential candidates, \ercl{} and ${}^7$\lierf{}, which display linewidths of 3~GHz and 250~MHz, respectively. The properties of ${}^7$\lierf{} satisfied our criterion for negative permeability.
