title: Experimental realization of a metamaterial detector focal plane array.
abstract: We present a metamaterial absorber detector array that enables room-temperature, narrow-band detection of gigahertz (GHz) radiation in the S band (2-4 GHz). The system is implemented in a commercial printed circuit board process and we characterize the detector sensitivity and angular dependence. A modified metamaterial absorber geometry allows for each unit cell to act as an isolated detector pixel and to collectively form a focal plane array . Each pixel can have a dedicated microwave receiver chain and functions together as a hybrid device tuned to maximize the efficiency of detected power. The demonstrated subwavelength pixel shows detected sensitivity of -77 dBm, corresponding to a radiation power density of 27 nW/m(2), with pixel to pixel coupling interference below -14 dB at 2.5 GHz.
authors.affiliation: Department of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, Massachusetts 02467, USA.
authors.forename: David
authors.initials: D
authors.lastname: Shrekenhamer
authors.forename: Wangren
authors.initials: W
authors.lastname: Xu
authors.forename: Suresh
authors.initials: S
authors.lastname: Venkatesh
authors.forename: David
authors.initials: D
authors.lastname: Schurig
authors.forename: Sameer
authors.initials: S
authors.lastname: Sonkusale
authors.forename: Willie J
authors.initials: WJ
authors.lastname: Padilla