Phase-preserving imaging of high frequency surface acoustic wave fields

Sölkner, G.; Ginter, A.; Grassl, H

doi:10.1016/0921-5093(89)90769-7

Cited by 12 publications

(2 citation statements)

References 3 publications

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“…The characterization of film structures which are small in size, however, requires SAW frequencies up to the GHz range. Phase accurate probing of high frequency SAW fields with a resolution of about 1 pm has been achieved by optical methods [3]. A better resolution was realized by using the scanning tunneling microscope (STM) as a local probe.…”

Section: Introductionmentioning

confidence: 99%

Scanning tunneling microscopy of RF oscillating surfaces

Chilla

Rohrbeck²,

Fröhlich

et al. 1994

Annalen der Physik

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Abstract. Amplitude and phase of high frequency surface acoustic wave (SAW) fields are investigated by a novel scanning tunnehg microscopy technique. The gap voltage is modulated at a slightly detuned high frequency. Due to the nonlinearity of the tunneling process a frequency mixing appears. For scanned areas with dimensions much smaller than the wavelength of the SAW a remarkable local variation of amplitude and phase of the tunneling current at the difference frequency is observed. Depending on the local morphology different components of the particle displacement vector are detected. Model calculations of amplitude and phase images are presented for a real topography.

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Section: Introductionmentioning

confidence: 99%

Scanning tunneling microscopy of RF oscillating surfaces

Chilla

Rohrbeck²,

Fröhlich

et al. 1994

Annalen der Physik

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show abstract

“…Such measurements allow one to retrieve fundamental properties of phononic crystals such as dispersion relations, phononic stop bands and acoustic eigenmode distributions or, in the case of phononic crystal devices in particular, the acoustic leakage characteristics. Optical techniques are well suited for application to such acoustic field measurements, from audio frequencies up to the gigahertz range, and can be classified into two categories, time domain, the subject of the present chapter, and frequency domain [1][2][3][4][5][6][7][8][9], the subject of the next chapter.…”

Section: Introductionmentioning

confidence: 99%