Nanoresonant signal boosters for carbon nanotube based infrared detectors.
We report the development of a sensitive carbon nanotube (CNT) infrared detector whose signals are boosted by nanoantenna-like features. This assembly is fabricated using nanoassembly of CNTs and a standard photolithographic process, together with nanoantenna-like features that are designed to create a resonance structure necessary to boost the electric field intensity at the CNT sensor. A novel approach is employed to find the near-field effect of the antenna. As a result, these effects are verified and demonstrated experimentally in this paper. The first experimental demonstration of a practical infrared device with nanoantenna-like structures is reported; it shows that the photocurrent is increased by an order of magnitude. The proposed fabrication and design process enables a ready integration of resonance structures into the manufacture of infrared devices, and opens the possibility of developing high fidelity infrared sensors with wide sensing range.
Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI, USA.
Carmen Kar Man
CK
Fung
Ning
N
Xi
Balasubramaniam
B
Shanker
King Wai Chiu
KW
Lai
D004563:Electrochemistry / Q000295:instrumentation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007259:Infrared Rays; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D010316:Particle Size; D010777:Photochemistry / Q000295:instrumentation; D010783:Photometry / Q000295:instrumentation*; D014159:Transducers
D037742:Nanotubes, Carbon