ライブラリ登録: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

CONTROLLING LIGHT TRAPPING IN DISORDERED STRUCTURES WITH SHORT-RANGE ORDER

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpe.022395
pages 5991-5999

要約

We investigate the influence of structural short-range order on light trapping in disordered media. Two types of disordered structures with different degrees of short-range order are studied, including stealthy hyperuniform (SHU) and hard disk (HD) structures. Results indicate that a higher level of short-range order leads to stronger Bragg scattering, resulting in an absorption peak which is observed in both two structures. Furthermore, to explore the underlying physical mechanisms, we calculate the relative inverse participation ratio (RIPR) and the cross density of states (CDOS), and find that structures with a higher degree of short-range order can support more eigenmodes and achieve higher degree of light localization. Besides, the comparison between two structures shows that SHU structures are more flexible in light absorption manipulation by means of tuning degrees of short-range order, even though it is confirmed that SHU structures can be seen as the counterparts of HD structures in reciprocal space, thus revealing that for some macroscopic properties such as absorptivity, there is no correspondence between reciprocal space and real space since the absorption is an integrated quantity. The present study paves the way in controlling light absorption using novel disordered nanostructures.