Direct visualization of terahertz electromagnetic waves in classic experimental geometries

Werley, Christopher A.; Nelson, Keith A.; Tait, C. Ryan

doi:10.1119/1.3652698

Cited by 10 publications

(5 citation statements)

References 27 publications

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“…Waveguiding of the THz field in the ferroelectric slab allows for direct detection and manipulation of fields over long (typically mm) distances. Control over THz generation is accomplished by spatiotemporally shaping the optical driving pulses [3,4], and subsequent wave propagation can be influenced by integrated photonic elements [5][6][7]. Furthermore, it is possible to characterize the interactions of the THz fields with these elements via time-resolved, phase-sensitive imaging [8] and to display the images from separate measurements in 'movie' form that shows wave propagation at lightlike speeds through the material.…”

Section: Introductionmentioning

confidence: 99%

Direct experimental visualization of waves and band structure in 2D photonic crystal slabs

et al. 2014

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We demonstrate for the first time the ability to perform time resolved imaging of terahertz (THz) waves propagating within a photonic crystal (PhC) slab. For photonic lattices with different orientations and symmetries, we used the electrooptic effect to record the full spatiotemporal evolution of THz fields across a broad spectral range spanning the photonic band gap. In addition to revealing real-space behavior, the data let us directly map the band diagrams of the PhCs. The data, which are in good agreement with theoretical calculations, display a rich set of effects including photonic band gaps, eigenmodes and leaky modes.S Online supplementary data available from stacks.iop.org/NJP/16/053003/ mmedia

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Section: Introductionmentioning

confidence: 99%

Direct experimental visualization of waves and band structure in 2D photonic crystal slabs

et al. 2014

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“…In polaritonics, THz waves can be manipulated by fabricated structures in slab waveguides that result in focusing [7], diffraction [18,19], additional waveguiding [20], filtering [21,22], localization and enhancement [23], or other specified transformations [24,21,25].…”

Section: Introductionmentioning

confidence: 99%

Chemically assisted femtosecond laser machining for applications in LiNbO3 and LiTaO3

et al. 2013

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We introduce and optimize a fabrication procedure that employs both femtosecond laser machining and hydrofluoric acid etching for cutting holes or voids in slabs of lithium niobate and lithium tantalate. The fabricated structures have 3 μm lateral resolution, a lateral extent of at least several millimeters, and cut depths of up to 100 μm. Excellent surface quality is achieved by initially protecting the optical surface with a sacrificial silicon dioxide layer that is later removed during chemical etching. To optimize cut quality and machining speed, we explored various laser machining parameters, including laser polarization, repetition rate, pulse duration, pulse energy, exposure time, and focusing, as well as scanning, protective coating, and etching procedures. The resulting structures significantly broaden the capabilities of terahertz polaritonics, in which lithium niobate and lithium tantalate are used for terahertz wave generation, imaging, and control. The approach should be applicable to a wide range of materials that are difficult to process by conventional methods. Keywords femtosecond laser machining • hydrofluoric acid etch • lithium niobate • lithium tantalate • terahertz polaritonics • surface treatment • silicon dioxide • materials processing

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“…The propagation of PP can be visualized by ultrafast time resolved phase‐contrast microscopy (Schlieren‐Imaging) (), where the movies show the wavelike behavior of PP such as interference, focusing, diffraction, etc. . Moreover, PP can be used for efficient generation of tunable narrow‐band terahertz light pulses ().…”

Section: Introductionmentioning

confidence: 99%

Selective preparation and detection of phonon polariton wavepackets by stimulated Raman scattering

Goldshteyn

Bojahr

Gaal

et al. 2013

Phys. Status Solidi B

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Wavevector‐selective impulsive excitation of phonon‐polaritons by a spectrally broad femtosecond transient grating produces wavepackets propagating in opposite directions. The photons in spectrally narrow probe pulses are scattered from these elementary excitations in lithium niobate (LiNbO3). Both elastically and inelastically scattered photons are simultaneously detected in a spectrometer. The Stokes‐ and anti‐Stokes shifted probe pulses uniquely determine the propagation direction of the detected polariton wavepacket components and correspond to creation or annihilation of phonon‐polaritons. Our experiments with spectrally broad pump and spectrally narrow probe pulses allows dissecting the four‐wave‐mixing process into two sequential stimulated Raman scattering events.

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Direct visualization of terahertz electromagnetic waves in classic experimental geometries

Cited by 10 publications

References 27 publications

Direct experimental visualization of waves and band structure in 2D photonic crystal slabs

Direct experimental visualization of waves and band structure in 2D photonic crystal slabs

Chemically assisted femtosecond laser machining for applications in LiNbO3 and LiTaO3

Selective preparation and detection of phonon polariton wavepackets by stimulated Raman scattering

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