Acousto-optically tunable lithium niobate photonic crystal

作者：Courjal Nadege^*; Benchabane Sarah; Dahdah Jean; Ulliac Gwenn; Gruson Yannick; Laude Vincent

来源：Applied Physics Letters, 2010, 96(13): 131103.

DOI：10.1063/1.3374886

• acousto-optical effects
• interdigital transducers
• lithium compounds
• photoelasticity
• photonic crystals
• piezo-optical effects
• Rayleigh waves
• refractive index
• surface acoustic wave transducers

We report on an active two-dimensional lithium niobate photonic crystal (PhC) driven by stationary Rayleigh surface acoustic waves. The configuration relies on two interdigital transducers that modulate the refractive index through the acousto-optical effect. Highly efficient, compact acousto-optical PhCs with an active length of only 13 mu m and a driving electrical power of 20 mW have been fabricated and characterized. Experiments show that an enhancement factor of the elasto-optical interaction of the order of 61 is obtained thanks to slow light effects in the PhC.

• 出版日期2010-3-29