Abstract

A new periodic Al groove structure coated by SiO2 thin film is designed and numerically investigated for wide-angle and polarization-insensitive broadband absorption. A metal groove array presents optical absorption enhancement due to the cavity mode resonance, with the absorption peak capable of being shifted by controlling the depth of the metal groove. Broadband absorption can be realized by a periodic array of metal grooves with different depths combined in one single period. A two-dimensional Al structure with four different grooves in each period is designed to realize polarization-insensitive broadband absorption from 220 nm to 800 nm with average absorption efficiency over 80% within the incident angle of 40°. These wide-angle and broadband absorption structures can be applied in UV/visible-related biochemical sensors, solar cells, or photocatalysts.

© 2017 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Multiband perfect absorbers using metal-dielectric films with optically dense medium for angle and polarization insensitive operation

Jong-Bum You, Wook-Jae Lee, Dongshik Won, and Kyoungsik Yu
Opt. Express 22(7) 8339-8348 (2014)

Wide-angle, polarization-independent and dual-band infrared perfect absorber based on L-shaped metamaterial

Yang Bai, Li Zhao, Dongquan Ju, Yongyuan Jiang, and Linhua Liu
Opt. Express 23(7) 8670-8680 (2015)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription