ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-469-4
ISBN Online: 978-1-56700-470-0
Second Thermal and Fluids Engineering Conference
Optimizing parameters of Si nanoring arrays for optical absorption enhancement
Аннотация
The optical property of Silicon nanoring arrays is investigated by finite difference time domain (FDTD)
simulation. The effect of geometric parameters, such as the pitch (p), the outer diameter (D) and the inner
diameter (d) of nanoring arrays with the thickness of 2 μm on light absorption is studied in detail. The
optimized parameters (p=700nm, D=700nm, and d=385nm) which result in optimal integrated absorption are
obtained. The optimal integrated absorption of Si nanoring arrays is 71.3% with a 76.0% enhancement as
compared with that of the Si thin film with the same thickness. With appropriate parameters, the optical
performance of nanoring arrays is superior to that of nanowire arrays. The effect of thickness on optical property
of nanoring arrays is also simulated. Finally, a new nanostructure is proposed with the optical performance
superior to that of the optimized nanoring arrays. Si nanoring arrays are potential for photovoltaic and photothermal applications with the absorption enhancement compared to the thin film.