تقرير
Optical forces on an oscillating dipole near VO$_2$ phase transition
| العنوان: | Optical forces on an oscillating dipole near VO$_2$ phase transition |
|---|---|
| المؤلفون: | Szilard, Daniela, Abrantes, Patrícia P., Pinheiro, Felipe A., Rosa, Felipe S. S., Farina, Carlos, Kort-Kamp, Wilton J. M. |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Optics, Quantum Physics |
| الوصف: | We investigate optical forces on oscillating dipoles close to a phase-change vanadium dioxide (VO$_2$) film, which exhibits a metal-insulator transition around $340$ K and low thermal hysteresis. This configuration is related to one composed of an excited two-level quantum emitter and we employ a classical description to capture important aspects of the radiation-matter interaction. We consider both electric and magnetic dipoles for two different configurations, namely, with the dipole moments parallel and perpendicular to the VO$_2$ film. By using Bruggeman theory to describe the effective optical response of the material, we show that, in the near-field regime, the force on the dipoles can change from attractive to repulsive just by heating the film for a selected frequency range. We demonstrate that the thermal hysteresis present in the VO$_2$ transition clearly shows up in the behavior of the optical forces, setting the grounds for alternative approaches to control light-matter interactions using phase-change materials. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3390/universe7060159 |
| URL الوصول: | http://arxiv.org/abs/2105.02493 |
| رقم الأكسشن: | edsarx.2105.02493 |
| قاعدة البيانات: | arXiv |
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