Antenna-coupled polycrystalline silicon air-bridge thermal detector for mid-infrared radiation

Chong, Nui; Ahmed, H.

doi:10.1063/1.119992

Cited by 35 publications

(10 citation statements)

References 13 publications

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“…2, 3 Advances in the fabrication and measurement of these devices make their application in different regions of the electromagnetic spectrum possible. 1 Previous work has reported promising results on the use of various planar nano-antenna geometries for long-wave infrared detection ($10 lm), [4][5][6][7][8][9] however, all the measurements were performed exclusively in the far-field. However, excitation and energy transfer to the bolometric element are largely dictated by the local near-field properties of the antenna.…”

Section: Introductionmentioning

confidence: 99%

Near-field mapping of dipole nano-antenna-coupled bolometers

Tucker

D’Archangel

Raschke

et al. 2013

Journal of Applied Physics

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The near-field characteristics of single, double, and arrays of connected dipole nano-antennas coupled to bolometers were studied by infrared scattering scanning near-field optical microscopy (s-SNOM) and analyzed by numerical simulations. Results were consistent with classical antenna theory showing the expected p phase difference across the terminals of the dipoles. However, according to the observed differences between the measurements and simulations, the symmetry of the amplitude signal appeared to be sensitive with respect to the position of the bolometric element relative to the dipoles. The effect of the position of the bolometer on the associated near-field distribution suggests an influence on the coupling and efficiency of energy transfer into these detectors, which could be important for determining tolerances in the fabrication of such devices. These results show how near-field measurements in general can provide critical information to guide the design of nano-antennas, nano-antenna-phased arrays, and integrated photonic devices.

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Section: Introductionmentioning

confidence: 99%

Near-field mapping of dipole nano-antenna-coupled bolometers

Tucker

D’Archangel

Raschke

et al. 2013

Journal of Applied Physics

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“…The device can be supplied by an electric heater on the membrane and then it can sense the gas flow as it results in the cooling of the heater [3]; in addition this construction is an electronic device realizing Quadratic Transfer Characteristics [4]. Regarding the THz and mid-infrared radiation the thermopiles were used only for read-out the temperature increment caused by absorption of the radiation in the feedpoint resistance of the metallic antenna [5], or in the thin-film absorber [6].…”

Section: Introductionmentioning

confidence: 99%

THz detection by modified thermopile

Szentpali

Matyi²,

Fürjes

et al. 2011

SPIE Proceedings

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The modified micromachined thermopile consists of linearly arranged thermopairs instead of the usual loops. This device can act as a series of antennas and senses the millimeter wave radiation [1]. The antenna-like operation was demonstrated by the strong dependence on the polarization. The working principle is similar to the bolometers in that respect that the absorbed radiation heats up the semiconductor strips, but the temperature increment is sensed by the Seebeck effect instead of the resistance increment. Therefore there is no read-out current and the voltage output starts from zero. In the present work we are going to search absorption spectra of the device. It is shown that the resonance depends mainly on the dimensions and shape of the chip; the linear thermopiles are rather E-field probes. The fabrication of the device will be also outlined as well as the experimental results.

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“…One of the potential applications of the optical antennas is to enhance the sensitivity of optical detectors, particularly infrared photodetectors. [4][5][6][7] High performance semiconductor-based photodetectors such as HgCdTe photoconductors and quantum well infrared photodetectors all require cryogenic cooling to operate. 8 Those infrared detectors are expensive and not trivial to scale down for portable infrared systems.…”

Section: Introductionmentioning

confidence: 99%