A millimeter-wave near-field scanning probe with an optical distance control

Golosovsky, M.; Lann, A. F.; Davidov, D.

doi:10.1016/s0304-3991(97)00058-2

Cited by 13 publications

(5 citation statements)

References 21 publications

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“…Others have studied evanescent fields in the context of imaging as well [14,15]. Several research groups, including our own, have used microwave resonators in the characterization of semiconductors with λ/100 [16][17][18][19][20][21][22][23]. The evanescent microwave probe (EMP) used in our work is a planar structure [19] that readily lends itself to implementation on a silicon cantilever beam.…”

Section: Scanning Evanescent Microwave Probe (Semp)mentioning

confidence: 99%

Multiscale mechanics of hierarchical structure/property relationships in calcified tissues and tissue/material interfaces

Katz

Misra

Spencer

et al. 2007

Materials Science and Engineering: C

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This paper presents a review plus new data that describes the role hierarchical nanostructural properties play in developing an understanding of the effect of scale on the material properties (chemical, elastic and electrical) of calcified tissues as well as the interfaces that form between such tissues and biomaterials. Both nanostructural and microstructural properties will be considered starting with the size and shape of the apatitic mineralites in both young and mature bovine bone. Microstructural properties for human dentin and cortical and trabecular bone will be considered. These separate sets of data will be combined mathematically to advance the effects of scale on the modeling of these tissues and the tissue/biomaterial interfaces as hierarchical material/structural composites. Interfacial structure and properties to be considered in greatest detail will be that of the dentin/adhesive (d/a) interface, which presents a clear example of examining all three material properties, (chemical, elastic and electrical). In this case, finite element modeling (FEA) was based on the actual measured values of the structure and elastic properties of the materials comprising the d/a interface; this combination provides insight into factors and mechanisms that contribute to premature failure of dental composite fillings. At present, there are more elastic property data obtained by microstructural measurements, especially high frequency ultrasonic wave propagation (UWP) and scanning acoustic microscopy (SAM) techniques. However, atomic force microscopy (AFM) and nanoindentation (NI) of cortical and trabecular bone and the dentin-enamel junction (DEJ) among others have become available allowing correlation of the nanostructural level measurements with those made on the microstructural level.

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Section: Scanning Evanescent Microwave Probe (Semp)mentioning

confidence: 99%

Multiscale mechanics of hierarchical structure/property relationships in calcified tissues and tissue/material interfaces

Katz

Misra

Spencer

et al. 2007

Materials Science and Engineering: C

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“…Although its precise value has to be determined by numerical calculations [12], [13], we can estimate it by using an approximation of Hallén's equations for thin short wire antennas . For our short antennas (0.3-1 mm) and frequencies of interest (1)(2)(3)(4)(5), the impedance has a nearly pure capacitive character ( ) with values in the range of 10 -10 . The protruding conductor functions as a nearly ideal current source and it is difficult to match its high impedance to the subsequent preamplifier with a standard impedance of approximately .…”

Section: Sensitivity Of the System And Calibration Of The Probesmentioning

confidence: 99%

“…In some cases, a modification in the probe geometry, such as the use of slit probes [3], [4], small dipole antennas, and open-ended transmission lines [5], [6] can increase signal-matching effi- ciency, change the polarization, or limit the region to which the antenna is sensitive. Due to good sensitivity and well-defined electric properties, we have focused our attention on the miniaturized coaxial antennas-cylindrical short monopoles-where a central conductor protrudes for a defined length from the shielding (see Fig.…”

Section: Electric-field Antennas and Position/signal Difference Mmentioning

confidence: 99%

Measurement of electric-field intensities using scanning near-field microwave microscopy

Kantor

Shvets

2003

IEEE Trans. Microwave Theory Techn.

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Abstract-In this paper, we propose methods for the measurement of electric intensities of a microwave field above the surface of microwave circuits. Using miniaturized coaxial antennas, we measure all spatial components of the induced field above device-under-test. A special position/signal difference method is used to better localize the measured field and increase the spatial resolution of the field mapping. During the scanning process, the antenna is driven at the defined distance above the sample surface according to previously acquired topographic data. For measurement of the tangential-field components parallel to the sample surface, the antenna is tilted by approximately 45 relative to the sample surface. By its rotation about the vertical axis, various components of the field are measured, and vertical and horizontal electric-field intensities are recalculated. The probes are calibrated in a well-defined field standard and allow good quantitative characterization of the measured field.Index Terms-Coaxial antennas, near-field measurements, scanning near-field microscopy.

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“…컫는 소형 개구(subwavelength aperture)에 의한 전자기적인 결합(electromagnetic coupling) 현상은 1944년 Hans Bethe [1] ( [5] . 들이 발표되었는데, 제안된 개구 구조들의 대표적인 형태로서, C 형태(C-shaped) 또는 H 형태(H-shaped)가 많은 관심을 끌어 왔다 [8] .…”

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General Theory for Enhancing the Transmission Efficiency through Small Apertures

Cho¹

2014

The Journal of Korean Institute of Electromagnetic Engineering

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In this paper, general methods for enhancing the transmission efficiency through the small subwavelength aperture in an infinite conducting plane are considered first by use of the transmission-resonant aperture like the ridged circular aperture structure, second by employing the transmission-resonant cavity structure. In particular, the maximum transmission cross section is found to be   ] for the two structures, where G is the gain of the aperture in the output half space. As experimental works, the impedance matching characteristics are investigated for the cases that above two structures are incorporated as a potential near field microscopic probe in the waveguide end. As a complementary problem to the above transmission-resonant aperture problem, some discussions are also given on the scattering resonance by the scattering object much smaller than the wavelength. This discussion may provide a good understanding of the physics for the phenomena that the maximum scattering cross section is much larger than the physical size of the atom in atomic physics area.

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A millimeter-wave near-field scanning probe with an optical distance control

Cited by 13 publications

References 21 publications

Multiscale mechanics of hierarchical structure/property relationships in calcified tissues and tissue/material interfaces

Multiscale mechanics of hierarchical structure/property relationships in calcified tissues and tissue/material interfaces

Measurement of electric-field intensities using scanning near-field microwave microscopy

General Theory for Enhancing the Transmission Efficiency through Small Apertures

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