Phase resolved near-field imaging of propagating waves in infrared tapered slot antennas

Florence, Louis A.; Kinzel, Edward C.; Olmon, Robert L.; Ginn, James; Raschke, Markus B.; Boreman, Glenn D.

doi:10.1016/j.infrared.2012.07.008

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…3(c) and 3(e)], but some of this difference and the large changes in phase can be attributed to the minimal amount of field in this area, which has been shown to yield relatively large error in phase. 19 Another difference between the simulations and experimental data shown is the lack of amplitude signal from the microbolometric element and the lead lines in the simulation as compared to the experiment where a relatively strong amplitude signal is present at these structures [ Figs. 3(b) and 3(d)].…”

Section: -2mentioning

confidence: 98%

“…Previously, antennas not coupled to a load, as well as antennas coupled to transmissions lines have been investigated with this technique. [18][19][20][21][22][23][24] However, to the best of our knowledge, the spatial near-field distribution of nanoantennas coupled to bolometers has not yet been explored and/or such insight used for device optimization.…”

Section: Introductionmentioning

confidence: 99%

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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: -2mentioning

confidence: 98%

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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“…These differences in the simulated and measured near-field phase can be attributed to the diminished field on the less resonant elements compared to the more resonant element, which increase errors in the phase data as has been seen previously. 36 In contrast, the phase in proximity to the more resonant element where there is stronger field shows much greater consistency between the simulations and experimental data. In Figs.…”

Section: -mentioning

confidence: 78%

Near- and far-field measurements of phase-ramped frequency selective surfaces at infrared wavelengths

Tucker

D’Archangel

Raschke³

et al. 2014

Journal of Applied Physics

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Near- and far-field measurements of phase-ramped loop and patch structures are presented and compared to simulations. The far-field deflection measurements show that the phase-ramped structures can deflect a beam away from specular reflection, consistent with simulations. Scattering scanning near-field optical microscopy of the elements comprising the phase ramped structures reveals part of the underlying near-field phase contribution that dictates the far-field deflection, which correlates with the far-field phase behavior that was expected. These measurements provide insight into the resonances, coupling, and spatial phase variation among phase-ramped frequency selective surface (FSS) elements, which are important for the performance of FSS reflectarrays.

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Optical Antennas

González

2015

Wiley Encyclopedia of Electrical and Electronics Engineering

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Antennas can be used either to transmit or to receive electromagnetic (EM) waves; the EM spectrum covers a vast range of frequencies of EM radiation. Therefore, all these ranges of frequencies can be detected with an antenna with dimensions proportional to the wavelength of the EM radiation. In the case of optical antennas, the dimensions are on the order of hundreds of nanometers, in which case nanolithographic tools such as electron‐beam lithography have to be used to fabricate them; this is why optical antennas are also called “nanoantennas.” These types of antennas provide polarization dependence, wavelength tuning, tunable bandwidth, and the possibility of using them in a phased array configuration that provides great advantages over traditional optical detectors.

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Phase resolved near-field imaging of propagating waves in infrared tapered slot antennas

Cited by 3 publications

References 21 publications

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

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

Near- and far-field measurements of phase-ramped frequency selective surfaces at infrared wavelengths

Optical Antennas

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