Abstract
Exceptional points(EPs) are degeneracies in non-Hermitian systems and give rise to counter intuitive, yet interesting physical effects. Inspired by the exotic physics of EP in designed metamaterials, we theoretically explore how an EPs-ring can be generated from a non-Hermitian resonant metamaterial bearing both dissipation and radiation losses. When the substrate thickness of this metamaterial is varied, the complex eigenvalues of the scattering matrix show a transition from single EP to a ring of EPs, where each EP is associated with maximally asymmetric reflection. We show that our scattering matrix based fitted coupled mode theory results agree very well with finite-difference time-domain simulations. Our work illustrates that the optical properties of the metamaterials can be dramatically altered by carefully tuning the dissipation and radiation losses.
| Original language | English |
|---|---|
| Pages (from-to) | 18265-18273 |
| Number of pages | 9 |
| Journal | Optics Express |
| Volume | 25 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 24 Jul 2017 |
Cite this
}
Spawning a ring of exceptional points from a metamaterial. / Kang, Ming; Zhu, Weiren; Wang, Hui-Tian; Premaratne, Malin.
In: Optics Express, Vol. 25, No. 15, 24.07.2017, p. 18265-18273.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Spawning a ring of exceptional points from a metamaterial
AU - Kang, Ming
AU - Zhu, Weiren
AU - Wang, Hui-Tian
AU - Premaratne, Malin
PY - 2017/7/24
Y1 - 2017/7/24
N2 - Exceptional points(EPs) are degeneracies in non-Hermitian systems and give rise to counter intuitive, yet interesting physical effects. Inspired by the exotic physics of EP in designed metamaterials, we theoretically explore how an EPs-ring can be generated from a non-Hermitian resonant metamaterial bearing both dissipation and radiation losses. When the substrate thickness of this metamaterial is varied, the complex eigenvalues of the scattering matrix show a transition from single EP to a ring of EPs, where each EP is associated with maximally asymmetric reflection. We show that our scattering matrix based fitted coupled mode theory results agree very well with finite-difference time-domain simulations. Our work illustrates that the optical properties of the metamaterials can be dramatically altered by carefully tuning the dissipation and radiation losses.
AB - Exceptional points(EPs) are degeneracies in non-Hermitian systems and give rise to counter intuitive, yet interesting physical effects. Inspired by the exotic physics of EP in designed metamaterials, we theoretically explore how an EPs-ring can be generated from a non-Hermitian resonant metamaterial bearing both dissipation and radiation losses. When the substrate thickness of this metamaterial is varied, the complex eigenvalues of the scattering matrix show a transition from single EP to a ring of EPs, where each EP is associated with maximally asymmetric reflection. We show that our scattering matrix based fitted coupled mode theory results agree very well with finite-difference time-domain simulations. Our work illustrates that the optical properties of the metamaterials can be dramatically altered by carefully tuning the dissipation and radiation losses.
UR - http://www.scopus.com/inward/record.url?scp=85025437373&partnerID=8YFLogxK
U2 - 10.1364/OE.25.018265
DO - 10.1364/OE.25.018265
M3 - Article
VL - 25
SP - 18265
EP - 18273
JO - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 15
ER -