Polarization rotation of THz radiation by an array of helices.

Naumova, E. V.; Prinz, V. Ya.; Селезнев, В. Д.; Golod, S. V.; Kubarev, V. V.; Knyazev, B. A.; Kulipanov, G.N.; Kuznetsov, S. А.; Kalinin, P. V.; Винокуров, Н.А.; Budker, G.I.

doi:10.1109/icimw.2006.368559

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…The spectroscopic characteristics of metamaterials have also been studied using NovoFEL radiation. The resonant rotation of the polarization plane by a chiral structure fabricated at the Institute of Semiconductor Physics SB RAS has been demonstrated in the range of 1.6-2.3 THz for the very first time [52]. The chiral structure was an array of oneturn helices made of InGaAs/GaAs/Ti/Au film (the unrolled length of the helix is 75 μm and the array density is 500 helices mm −2 ).…”

Section: Spectroscopy and Spectral Selective Radioscopymentioning

confidence: 99%

Novosibirsk terahertz free electron laser: instrumentation development and experimental achievements

Knyazev

Кулипанов

Винокуров

2010

Meas. Sci. Technol.

122

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Nowadays, the Novosibirsk free electron laser (NovoFEL) is the most intense radiation source in the terahertz spectral range. It operates in the continuous mode with a pulse repetition rate of up to 11.2 MHz (5.6 MHz in the standard mode) and an average power of up to 500 W. The radiation wavelength can be precisely tuned from 120 to 240 mm with a relative line width of 0.3-1%, which corresponds to the Fourier transform limit for a micropulse length of 40-100 ps. The laser radiation is plane-polarized and completely spatially coherent. The radiation is transmitted to six user stations through a nitrogen-filled beamline. Characteristics of the NovoFEL radiation differ drastically from those of conventional low-power (and often broadband) terahertz sources, which enables obtaining results impossible with other sources, but necessitates the development of special experimental equipment and techniques. In this paper, we give a review of the instrumentation developed for control and detection of high-power terahertz radiation and for the study of interaction of the radiation with matter. Quasi-optic elements and systems, one-channel detectors, power meters, real-time imagers, spectroscopy devices and other equipment are described. Selected experimental results (continuous optical discharge, material and biology substance ablation, real-time imaging attenuated total reflection spectroscopy, speckle metrology, polarization rotation by an artificial chiral structure, terahertz radioscopy and imaging) are also presented in the paper. In the near future, after commissioning another four electron racetracks and two optical resonators, intense radiation in the range from 5 to 240 μm will be available for user experiments.

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Section: Spectroscopy and Spectral Selective Radioscopymentioning

confidence: 99%

Novosibirsk terahertz free electron laser: instrumentation development and experimental achievements

Knyazev

Кулипанов

Винокуров

2010

Meas. Sci. Technol.

122

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“…HE optical activity of a 2D array of metal-semiconductor microhelices in the THz range was described earlier in [1]. The main result of the paper was 17 's rotation of polarization plane of 2.11 THz radiation by a one-layer sample.…”

Section: Introductionmentioning

confidence: 97%

Terahertz optical activity and metamaterial properties of 2D array of metal-semiconductor microhelices

Kubarev

Prinz

Naumova

et al. 2009

2009 34th International Conference on Infrared, Millimeter, and Terahertz Waves

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The terahertz optical activity of 2D arrays of metal-semiconductor microhelices was investigated by Fourier spectroscopy and free electron laser methods. We found strong resonance at first harmonic with wavelength twice helix length and weaker resonances at the second and third harmonics. The resonances are present in the transmittance, reflectance, and absorption spectra. For linear polarized radiation, a chirality of the media leads to their ellipticity at resonance frequency and rotation of the polarization plane in opposite directions (up to 16.5 degrees) on both sides of the resonance. It has been shown by direct interferometric method on free electron laser that the refraction index of the investigated layer has negative values for definite circular wave at certain frequencies. Its minimal value is -0.11.

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Three-Dimensional Systems and Nanostructures

Prinz

2017

Advances in Semiconductor Nanostructures

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Polarization rotation of THz radiation by an array of helices.

Cited by 5 publications

References 3 publications

Novosibirsk terahertz free electron laser: instrumentation development and experimental achievements

Novosibirsk terahertz free electron laser: instrumentation development and experimental achievements

Terahertz optical activity and metamaterial properties of 2D array of metal-semiconductor microhelices

Three-Dimensional Systems and Nanostructures

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