Sharp Fano resonance in 2D photonic crystal and the applications

• 作者: CHEN Bing CHEN De-yuan LI Meng-fan XIA Yu ZHANG Yan
• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2020,（5）
• 所属期刊栏目: Materials
• 页码范围: 349-354
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11801-020-9190-2

摘要

Fano resonance is realized theoretically in a photonic crystal.The structure is composed of a cavity side coupled to a partially transmitting waveguide.By optimizing the structure parameters,asymmetric sharp Fano resonance transmit tance spectrum is achieved with quality factor of 2 213,extinction ratio of 57 dB and peak loss of 0.2 dB.The sharp spectrum can be used in sensor applications.Such as pressure sensor,the pressure sensitivity is about 9.15 nm/GPa.and for refractive index sensing application,the sensitivity is about 800 nm/RIU,and the maximum of figure of merit can reach 1 000.Besides,this sharp Fano resonance based on photonic crystal has potential applications in optical switches,filters etc.And it can be integrated into optical communications and optical integration circuits.