Patel Shobhit K, Udayakumar Arun Kumar, Mahendran G, Vasudevan B, Surve Jaymit, Parmar Juveriya
Department of Computer Engineering, Marwadi University, Rajkot, Gujarat, 360003, India.
Department of EEE, SRM Institute of Science and Technology, Ramapuram Campus, Chennai, Tamilnadu, 600089, India.
Sci Rep. 2022 Oct 27;12(1):18044. doi: 10.1038/s41598-022-22951-1.
Although different materials and designs have been tried in search of the ideal as well as ultra-wideband light absorber, achieving ultra-broadband and robust unpolarized light absorption over a wide angular range has proven to be a major issue. Light-field regulation capabilities provided by optical metamaterials are a potential new technique for perfect absorbers. It is our goal to design and demonstrate an ultra-wideband solar absorber for the ultraviolet to a mid-infrared region that has an absorptivity of TE/TM light of 96.2% on average. In the visible, NIR, and MIR bands of the solar spectrum, the absorbed energy is determined to be over 97.9%, above 96.1%, and over 95%, respectively under solar radiation according to the Air Mass Index 1.5 (AM1.5) spectrum investigation. In order to achieve this wideband absorption, the TiN material ground layer is followed by the SiO layer, and on top of that, a Cr layer with patterned Ti-based resonators of circular and rectangular multiple patterns. More applications in integrated optoelectronic devices could benefit from the ideal solar absorber's strong absorption, large angular responses, and scalable construction.
尽管人们尝试了不同的材料和设计来寻找理想的以及超宽带光吸收器，但事实证明，要在宽角度范围内实现超宽带且稳定的非偏振光吸收是一个主要问题。光学超材料提供的光场调控能力是实现完美吸收器的一种潜在新技术。我们的目标是设计并展示一种用于紫外到中红外区域的超宽带太阳能吸收器，其对TE/TM光的平均吸收率为96.2%。根据空气质量指数1.5（AM1.5）光谱研究，在太阳光谱的可见光、近红外和中红外波段，在太阳辐射下，吸收的能量分别被确定为超过97.9%、高于96.1%和超过95%。为了实现这种宽带吸收，在TiN材料底层之后是SiO层，在此之上是具有圆形和矩形多种图案的图案化Ti基谐振器的Cr层。理想太阳能吸收器的强吸收、大角度响应和可扩展结构可使集成光电器件有更多应用。
