| Title |
Oscillator chain: a simple model for universal description of excitation of waveguiding modes in thin films |
| Authors |
Staliūnas, Kęstutis |
| DOI |
10.1002/andp.202500219 |
| Full Text |
|
| Is Part of |
Annalen der Physik.. Weinheim : John Wiley and Sons Inc. 2025, vol. 537, iss. 10, art. no. e00219, p. [1-6].. ISSN 0003-3804. eISSN 1521-3889 |
| Keywords [eng] |
fano resonances ; oscillator chain ; thin films |
| Abstract [eng] |
There is no simple and universal analytical description of various micro-optical systems related with Fano resonances. This especially concerns modulated thin films, which, when coupled to external fields, show Fano resonances. Usually, such micro-optic schemes are simulated numerically, frequently by the use of commercial software. The study fills this gap of the lack of universal analytical description by introducing and exploring a simple mechanical equivalent, the oscillator chain, which mimics such schemes involving Fano resonances. The model does not necessarily provide the rigorous description of complicated micro-optical schemes, however does capture the main properties of such Fano-related micro-optical systems. The model captures different modifications of the thin film arrangement as well: thin film with amplification, non-Hermitical thin films, and others. It also covers the case of multiple Fano resonances in a thin film. The model is validated by comparing with the rigorously calculated wave propagation in the thin films. |
| Published |
Weinheim : John Wiley and Sons Inc |
| Type |
Journal article |
| Language |
English |
| Publication date |
2025 |
| CC license |
|
