Deposition and characterization of far-infrared absorbing gold black films

Advena, Donna J.; Bly, Vincent T.; Cox, J. Thomas

doi:10.1364/ao.32.001136

Cited by 75 publications

(42 citation statements)

References 9 publications

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“…In films prepared using this procedure, a complex granular structure results from the randomization of atomic velocities before aggregation in the gas phase [8][9][10][11][12] . Such films often but not always resemble the product of diffusion-limited aggregation.…”

Section: Sample Fabrication and Morphologymentioning

confidence: 99%

Photoacoustic ultrasound sources from diffusion-limited aggregates

Patel

Brubaker

Kotlerman

et al. 2016

Applied Physics Letters

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Metallic diffusion-limited aggregate (DLA) films are well-known to exhibit near-perfect broadband optical absorption. We demonstrate that such films also manifest a substantial and relatively material-independent photoacoustic response, as a consequence of their random nanostructure. We theoretically and experimentally analyze photoacoustic phenomena in DLA films, and show that they can be used to create broadband aircoupled acoustic sources. These sources are inexpensive and simple to fabricate, and work into the ultrasonic regime. We illustrate the device possibilities by building and testing an optically-addressed acoustic phased array capable of producing virtually arbitrary acoustic intensity patterns in air.

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Section: Sample Fabrication and Morphologymentioning

confidence: 99%

Photoacoustic ultrasound sources from diffusion-limited aggregates

Patel

Brubaker

Kotlerman

et al. 2016

Applied Physics Letters

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“…Applying for example black paint or "soot" to a surface are viable methods to obtain a reasonably black surface. The use of metal particulate coatings, such as platinum and gold, by electro-chemical deposition or evaporation, have been shown to produce good absorption over a wide spectral range [5][6] .…”

Section: Detector Designmentioning

confidence: 99%

<title>IR detectors for the GERB instrument on MSG</title>

et al. 1997

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The Geostationary Earth Radiation Budget (GERB) instrument is to be flown on ESA"s Meteosat Second Generation (MSG) satellite in 2000. The purpose of the instrument is to measure accurately the daily cycle of the reflected and emitted radiation of the Earth over at least a five year period. The measurements will be made from geostationary orbit and will complement those planned from instruments in low Earth polar orbits. The data from GERB will provide the first consistent measurements of the hour-by-hour variation of clouds and simultaneous measurements of the radiation balance, and will allow climate models to be further developed and validated. The instrument will accumulate images of the Earth disc every 15 minutes in wavebands of 0.32 -4.0 m and 0.32 -30 m with a nadir resolution of 50 km. The detector for this instrument consists of a 256 pixel linear array of thermoelectric (TE) elements. The TE array operates at room temperature and is blacked to give a flat spectral response over the 0.32 -30 m band. The detector hybrid consists of the 256 pixel detector plus 4 Application Specific Integrated Circuits (ASICs), comprising 64 channels each, which perform front end analogue signal processing, A/D conversion and multiplexing. As the MSG platform is spin-stabilised, the Earth image is stabilised on the detector using a de-spin mirror and is only present on the detector for 40 ms. Integration of the signal over the 40 ms and taken over a 15 minute observation period enables the radiance in both long and short wavebands to be measured to an accuracy better than 1%. The detector concept is described and test results of a prototype system are presented.

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“…Similarly, arrays of geometric tapers and wedges have been employed to reduce the physical envelope required for calibration targets and loads. [5][6][7] Gold black, 8,9 silicon black, 10 and carbon nanotubes [11][12][13] provide examples of low-dielectric-contrast media exhibiting high-absorptance bandwidths.…”

Section: Introductionmentioning

confidence: 99%

A broadband micro-machined far-infrared absorber

Wollack

Datesman

Jhabvala

et al. 2016

Review of Scientific Instruments

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The experimental investigation of a broadband far-infrared meta-material absorber is described. The observed absorptance is > 0.95 from 1 − 20 THz (300 − 15 µm) over a temperature range spanning 5 − 300 K. The meta-material, realized from an array of tapers ≈ 100 µm in length, is largely insensitive to the detailed geometry of these elements and is cryogenically compatible with silicon-based micro-machined technologies. The electromagnetic response is in general agreement with a physically motivated transmission line model.

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Deposition and characterization of far-infrared absorbing gold black films

Cited by 75 publications

References 9 publications

Photoacoustic ultrasound sources from diffusion-limited aggregates

Photoacoustic ultrasound sources from diffusion-limited aggregates

<title>IR detectors for the GERB instrument on MSG</title>

A broadband micro-machined far-infrared absorber

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