期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.177401
关键词
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资金
- Office of Naval Research under U.S. Navy [N00014-07-1-0819]
- Department of Energy [DE-SC0005240]
- National Science Foundation [ECCS-1002340]
- U.S. Department of Energy (DOE) [DE-SC0005240] Funding Source: U.S. Department of Energy (DOE)
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1002152] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1002340] Funding Source: National Science Foundation
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.
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