Grating Diffraction Effects in the THz Domain

Coutaz, Jean‐Louis; Garet, Frédéric; Bonnet, Emmanuel; Tishchenko, A.V.; Parriaux, Ο.; Назаров, М. М.

doi:10.12693/aphyspola.107.26

Cited by 18 publications

(10 citation statements)

References 10 publications

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“…Typical THz optics consist of diffraction gratings, lenses [3], waveguides/ dielectric fibers [4] and prisms [5]. Conventionally, optical elements have been made by subtractive methods, such as machining lenses on a lathe [6], or cutting grooves in a substrate to form a diffraction grating [7,8].…”

Section: Introductionmentioning

confidence: 99%

Feasibility and Characterization of Common and Exotic Filaments for Use in 3D Printed Terahertz Devices

Squires

Lewis

2018

J Infrared Milli Terahz Waves

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Recent years have seen an influx of applications utilizing 3D printed devices in the terahertz regime. The simplest, and perhaps most versatile, modality allowing this is Fused Deposition Modelling. In this work, a holistic analysis of the terahertz optical, mechanical and printing properties of 17 common and exotic 3D printer filaments used in Fused Deposition Modelling is performed. High impact polystyrene is found to be the best filament, with a useable frequency range of 0.1-1.3 THz, while remaining easily printed. Nylon, polylactic acid and polyvinyl alcohol give the least desirable terahertz response, satisfactory only below 0.5 THz. Interestingly, most modified filaments aimed at increasing mechanical properties and ease of printing do so without compromising the useable terahertz optical window. Abstract Recent years have seen an influx of applications utilizing 3D printed devices in the terahertz regime. The simplest, and perhaps most versatile, modality allowing this is Fused Deposition Modelling. In this work, a holistic analysis of the terahertz optical, mechanical and printing properties of 17 common and exotic 3D printer filaments used in Fused Deposition Modelling is performed. High impact polystyrene is found to be the best filament, with a useable frequency range of 0.1-1.3 THz, while remaining easily printed. Nylon, polylactic acid and polyvinyl alcohol give the least desirable terahertz response, satisfactory only below 0.5 THz. Interestingly, most modified filaments aimed at increasing mechanical properties and ease of printing do so without compromising the useable terahertz optical window.

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Section: Introductionmentioning

confidence: 99%

Feasibility and Characterization of Common and Exotic Filaments for Use in 3D Printed Terahertz Devices

Squires

Lewis

2018

J Infrared Milli Terahz Waves

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“…Diffraction of light by periodically one-dimensional (1D) corrugated surface has been a subject of continuing interest since the early days of the electromagnetic theory. [1][2][3][4] Recently, some of more interesting examples involve the coupling of light to metal surface, which can lead to what is known as enhanced or extraordinary optical transmission (EOT) due to the excitation of surface plasmons (SPs) in the subwavelength structured metal interface. 5,6 EOT of the metallic 1D gratings is particularly attractive at terahertz (THz) frequencies for developing high-contrast cut-off filters and high extinctionratio polarizers.…”

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confidence: 99%

Terahertz magnetic and electric Mie resonances of an all-dielectric one-dimensional grating

Yang

Cui

Geng

et al. 2015

Applied Physics Letters

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Resonantly enhanced Raman scattering in dielectric nanostructures has been recently proven to be an efficient tool for developing nanothermometry and experimental determination of their mode-composition. In this paper, we develop a rigorous analytical theory based on the Green's function approach to calculate the Raman emission from crystalline high-index dielectric nanoparticles. As an example, we consider silicon nanoparticles which have a strong Raman response due to active optical phonon modes. We relate enhancement of Raman signal emission to Purcell effect due to the excitation of Mie modes inside the nanoparticles. We also employ the numerical approach to the calculation of inelastic Raman emission in more sophisticated geometries, which do not allow a straightforward analytical form of the Green's function description. The Raman response from a silicon nanodisk has been analyzed within the proposed method, and the contribution of the various Mie modes has been revealed.

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“…This is explained by the fact that the used AR structure partly works as a saw-tooth diffractive grating [22][23][24] for selected (shorter) wavelengths, as it was previously demonstrated e.g. for photo-induced gratings [25].…”

Section: Experimental Measurements and Numerical Simulationsmentioning

confidence: 77%

3-D Printed Anti-Reflection Structures for the Terahertz Region

Bomba

Suszek

Makowski

et al. 2017

J Infrared Milli Terahz Waves

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Terahertz radiation has a growing number of applications in material characterization, where spectral fingerprinting and diffractive effects are the carriers of information. On the other hand, electromagnetic waves in the range of millimeters exhibit strong unwanted specular reflections, resulting in uncontrolled interferences. This problem is especially disturbing in the goniometric time-domain spectroscopy (TDS) configuration, where angular distribution of the field modified by the sample is altered by unwanted reflections. For this reason, low-cost anti-reflection layers are desired. Here, we present a simple way of designing and manufacturing one-sided and two-sided anti-reflection polyamide layers for the THz range. The structures were fabricated using 3-D printers based on selective laser sintering. We demonstrate experimentally in the goniometric time-domain spectroscopy the significant reduction of wavelength-dependent oscillations in Fabry-Perot configuration in the range between 0.1 and 0.3 THz. We also examine the influence of the anti-reflection layers on the distribution of THz energy in reflected, transmitted, and diffracted fields. MotivationTerahertz radiation has been the subject of growing attention because of its unique properties: non-ionizing nature, good transmission through many non-metallic media, and the possibilities of spectral fingerprinting of various materials, including hazardous ones. THz beams are used in numerous areas, including medicine, telecommunication, and security systems. In most of

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Grating Diffraction Effects in the THz Domain

Cited by 18 publications

References 10 publications

Feasibility and Characterization of Common and Exotic Filaments for Use in 3D Printed Terahertz Devices

Feasibility and Characterization of Common and Exotic Filaments for Use in 3D Printed Terahertz Devices

Terahertz magnetic and electric Mie resonances of an all-dielectric one-dimensional grating

3-D Printed Anti-Reflection Structures for the Terahertz Region

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