Abstract

Improving the sensitivity of infrared detectors is an essential step for future applications, including satellite- and terrestrial-based systems. We investigate nanoantenna-enabled detectors (NEDs) in the infrared, where the nanoantenna arrays play a fundamental role in enhancing the level of absorption within the active material of a photodetector. The design and optimization of nanoantenna-enabled detectors via full-wave simulations is a challenging task given the large parameter space to be explored. Here, we present a fast and accurate fully analytic circuit model of patch-based NEDs. This model allows for the inclusion of real metals, realistic patch thicknesses, non-absorbing spacer layers, the active detector layer, and absorption due to higher-order evanescent modes of the metallic array. We apply the circuit model to the design of NED devices based on Type II superlattice absorbers, and show that we can achieve absorption of 70% of the incoming energy in subwavelength (λ/5) absorber layers. The accuracy of the circuit model is verified against full-wave simulations, establishing this model as an efficient design tool to quickly and accurately optimize NED structures.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Design and analysis of perfect terahertz metamaterial absorber by a novel dynamic circuit model

Mohammad Parvinnezhad Hokmabadi, David S. Wilbert, Patrick Kung, and Seongsin M. Kim
Opt. Express 21(14) 16455-16465 (2013)

Adopting image theorem for rigorous analysis of a perfect electric conductor–backed array of graphene ribbons

Mahdi Rahmanzadeh, Ali Abdolali, Amin Khavasi, and Hamid Rajabalipanah
J. Opt. Soc. Am. B 35(8) 1836-1844 (2018)

Design principles for infrared wide-angle perfect absorber based on plasmonic structure

Mingbo Pu, Chenggang Hu, Min Wang, Cheng Huang, Zeyu Zhao, Changtao Wang, Qin Feng, and Xiangang Luo
Opt. Express 19(18) 17413-17420 (2011)

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 (12)

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 (26)

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

Metrics

You do not have subscription access to this journal. Article level metrics 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