Kovalevich Tatiana, Ndao Abdoulaye, Suarez Miguel, Tumenas Saulius, Balevicius Zigmas, Ramanavicius Arunas, Baleviciute Ieva, Häyrinen Markus, Roussey Matthieu, Kuittinen Markku, Grosjean Thierry, Bernal Maria-Pilar
Opt Lett. 2016 Dec 1;41(23):5616-5619. doi: 10.1364/OL.41.005616.
We present an original type of one-dimensional photonic crystal that includes one anisotropic layer made of a lithium niobate thin film. We demonstrate the versatility of such a device sustaining different Bloch surface waves (BSWs), depending on the orientation of the incident wave. By varying the orientation of the illumination of the multilayer, we measured an angle variation of 7° between the BSWs corresponding to the extraordinary and the ordinary index of the lithium niobate thin film. The potential of such a platform opens the way to novel tunable and active planar optics based on the electro- and thermo-optical properties of lithium niobate.
我们展示了一种新型的一维光子晶体，它包含一个由铌酸锂薄膜制成的各向异性层。我们证明了这种器件的多功能性，即根据入射波的方向维持不同的布洛赫表面波（BSW）。通过改变多层结构的光照方向，我们测量了对应于铌酸锂薄膜非常光折射率和寻常光折射率的BSW之间7°的角度变化。这种平台的潜力为基于铌酸锂电光和热光特性的新型可调谐有源平面光学开辟了道路。
