Analog of electromagnetically induced transparency in an E-shaped all-dielectric metasurface based on toroidal dipolar response
Abstrak
An analog of electromagnetically induced transparency (EIT) in an asymmetric E-shaped all-dielectric metasurface was proposed and numerically demonstrated in the near infrared spectral region. The E-shaped metasurface supports a strong toroidal dipolar resonance with high quality (Q) factor, which is verified by decomposed scattered powers for multipole moments using a Cartesian coordinate system. A high transmission EIT-like optical response was achieved, and clearly interpreted by the destructive interference between the dark toroidal dipolar moment and bright magnetic dipolar mode through the asymmetric metasurface. The bandwidth of the transparency window can be easily designed by changing the asymmetric parameter of the structure. The proposed E-shaped all-dielectric metasurface gives a new way to realize toroidal dipolar response and has potential applications in bio-chemical sensing, narrowband filters, optical modulations, and slow light based devices.
Topik & Kata Kunci
Penulis (6)
Bingxin Han
Xiangjun Li
Chuanshuai Sui
Jinyan Diao
Xufeng Jing
Zhi Hong
Akses Cepat
- Tahun Terbit
- 2018
- Bahasa
- en
- Total Sitasi
- 49×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1364/OME.8.002197
- Akses
- Open Access ✓