Sinchuk Kirill, Dudley Richard, Graham John D, Clare Michael, Woldeyohannes Mesfin, Schenk John O, Ingel Robert P, Yang Weiguo, Fiddy Michael A
Department of Engineering and Technology, Western Carolina University, Cullowhee, NC 28723, USA.
Opt Express. 2010 Jan 18;18(2):463-72. doi: 10.1364/OE.18.000463.
We experimentally verify the anomalous phase behavior in metamaterial structures with birefringent materials predicted by Mandatori, et. al. using form birefringent structures. Large birefringence as much as Deltan/n = 0.7 has been achieved by surface-treated form birefringent discs, making compact single layer Mandatori structures viable. With a reduced model of a single layer birefringent structure, the relationship between design parameters (thickness and orientation angle) and device operation and performance parameters (such as the center operation frequency, bandwidth, effective negative index, negative group index of refraction, and the transmission throughput) are derived and verified experimentally. Tunable group index of refraction from strong slow light of ng = 29.6 to fast light of ng = -1.1 are measured experimentally.
我们通过实验验证了曼达托里等人利用形状双折射结构预测的双折射材料超材料结构中的异常相行为。经表面处理的形状双折射圆盘已实现高达Δn/n = 0.7的大双折射，使得紧凑的单层曼达托里结构成为可行方案。通过简化的单层双折射结构模型，推导并通过实验验证了设计参数（厚度和取向角）与器件操作及性能参数（如中心操作频率、带宽、有效负折射率、负群折射率以及传输通量）之间的关系。实验测量了从ng = 29.6的强慢光到ng = -1.1的快光的可调群折射率。
