Frequency-dependent characterization of THz Sommerfeld wave propagation on single-wires

Wächter, M.; Nagel, M.; Kurz, H.

doi:10.1364/opex.13.010815

Cited by 77 publications

(40 citation statements)

References 17 publications

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“…These waves are extensively used in THz near-field imaging as shown in Section 2.6. The Aachen group directly studied the field at the wire itself using their PC probe-tip based setup [100] which leads to use tapered wire as near-field probe [10]. The Mittleman group has measured the spatial profile of the electric near-field at the end of a wire where THz waves were propagating.…”

Section: Plasmonics On a Flat Surfacementioning

confidence: 99%

Review of Near-Field Terahertz Measurement Methods and Their Applications

Adam

2011

J Infrared Milli Terahz Waves

198

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In the last decades, many research teams working at Terahertz frequencies focused their efforts on surpassing the diffraction limit. Numerous techniques have been investigated, combining methods existing at optic wavelength with THz system such as Time Domain Spectroscopy. The actual development led on one side to a resolution as high as λ/3000 and one the other side to a video-rate recording. The purpose of this paper is to give an overview of the history of the field, to describe the different approaches, to give examples of existing applications and to draw the perspective for this research area.

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Section: Plasmonics On a Flat Surfacementioning

confidence: 99%

Review of Near-Field Terahertz Measurement Methods and Their Applications

Adam

2011

J Infrared Milli Terahz Waves

198

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“…The THz pulses propagate on these wires as surface plasmon polaritons having a radial polarization and are often referred to as Sommerfeld waves [3,4]. It has been shown that these pulses can travel relatively long distances of up to a few meters on these wires, since they experience little attenuation [2,3].…”

Section: Introductionmentioning

confidence: 99%

Frequency-dependent radiation patterns emitted by THz plasmons on finite length cylindrical metal wires

Deibel¹,

Berndsen²,

Wang³

et al. 2006

Opt. Express

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Abstract:We report on the emission patterns from THz plasmons propagating towards the end of cylindrical metal waveguides. Such waveguides exhibit low loss and dispersion, but little is known about the dynamics of the terahertz radiation at the end of the waveguide, specifically in the near-and intermediate-field. Our experimental results and numerical simulations show that the near-and intermediate-field terahertz spectra, measured at the end of the waveguide, vary with the position relative to the waveguide. This is explained by the frequency-dependent diffraction occurring at the end of the cylindrical waveguide. Our results show that near-field changes in the frequency content of THz pulses for increasing wire-detector distances must be taken into account when studying surface waves on cylindrical waveguides.

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“…Frequency-domain propagation parameters (not shown here) of the wire have been retrieved from the time-domain data by a procedure described in [55]. Using these freely-positionable PC probetips the frequency-dependent attenuation and dispersion behaviour of Sommerfeld wires was measured in qualitative and quantitative agreement with numerical field simulations [64]. Compared to other approaches, where the field radiated from the end of the waveguide is probed, our method appears to be favorable for waveguide characterization since the field pattern radiated from an open end of a waveguide is highly-frequency dependent [65].…”

Section: Application Examples: Thz Waveguide Probe-tip and Antenna Dmentioning

confidence: 98%

“…The probe-tip has been applied to characterize the propagation properties of THz Sommerfeld wire waveguides by recording the amplitude and phase information of transient electric fields after different propagation distances [64]. For this task, a radial LT-GaAs-based PC antenna, as sketched in Fig.…”

Section: Application Examples: Thz Waveguide Probe-tip and Antenna Dmentioning

confidence: 99%

Coherent and ultrafast optoelectronics in III–V semiconductor compounds

Först

Nagel

Awad

et al. 2007

Physica Status Solidi (b)

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PACS 63. 22.+m, 71.55.Eq, 72.20.Jv, 78.47.+p III -V compound semiconductors offer a fascinating multitude of phenomena which have become accessible via ultrafast time-resolved spectroscopy. Coherent vibronic and electronic dynamics are prepared by excitation with taylored femtosecond laser pulses. The analysis of their temporal dephasing or decay provides deep insights into the interaction between electronic and vibronic degrees of freedem and the surrounding bath in high purity quantum structures. In contrast to coherent electronic or vibronic states, deliberately introduced growth defects can be used to drastically shorten the lifetime of optically excited carriers. Sub-picosecond carrier lifetimes open the possibility to realize ultrafast saturable absorbers and optoelectronic transducer elements. They are particularly important as key elements in THz technology, such as efficient THz emitters, detectors, and for on-chip THz technology. This paper summarizes the most distinguished results relevant in the context of ultrafast optoelectronics and THz technology obtained in close collaboration with the Paul-Drude-Institute Berlin over the past decade.

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Frequency-dependent characterization of THz Sommerfeld wave propagation on single-wires

Cited by 77 publications

References 17 publications

Review of Near-Field Terahertz Measurement Methods and Their Applications

Review of Near-Field Terahertz Measurement Methods and Their Applications

Frequency-dependent radiation patterns emitted by THz plasmons on finite length cylindrical metal wires

Coherent and ultrafast optoelectronics in III–V semiconductor compounds

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