Optical phase detection in a 4-N,N-dimethylamino-4′-N′-methyl-stilbazolium tosylate crystal for terahertz time domain spectroscopy system at 1.55 μm wavelength

Martín, M.; Mangeney, J.; Crozat, P.; Mounaix, Patrick

doi:10.1063/1.3490706

Cited by 20 publications

(20 citation statements)

References 11 publications

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“…Therefore, for optoelectronic THz applications, heavy-ion irradiation of In 0.53 Ga 0.47 As material is preferred than light ion irradiation [51]. 47 As PC antenna using a DAST electro-optic crystal as the detector [53]. Figure 11 a) displays the electric field waveform generated by the ion-irradiated In 0.53 Ga 0.47 As PC antenna and detected in the DAST crystal using 80-fs laser pulses with a center wavelength of 1.55 μm.…”

Section: Pc Antennas Made From Ion Irradiated In 053 Ga 047 As Matementioning

confidence: 99%

THz Photoconductive Antennas Made From Ion-Bombarded Semiconductors

Mangeney

2011

J Infrared Milli Terahz Waves

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Section: Pc Antennas Made From Ion Irradiated In 053 Ga 047 As Matementioning

confidence: 99%

THz Photoconductive Antennas Made From Ion-Bombarded Semiconductors

Mangeney

2011

J Infrared Milli Terahz Waves

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“…Several refractive index profiles designed for focusing or collimating an elastic wave that enters a GRIN PC have been proposed [9][10][11][12][13][14][15][16][17][18][19][20]. Deriving the trajectory y x ( ) of the waves without carrying out any approximation is generally not doable.…”

Section: Ray Trajectory Analysismentioning

confidence: 99%

“…Using PC to focalize elastic waves with frequencies in the first branch of the Brillouin zone where negative refraction effects are not involved, is however possible if considering gradient index phononic crystals (GRIN PCs) [9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Actually, when an acoustic beam propagates through a 2D GRIN PC, it encounters redirection at every virtual interface between layers, resulting in successive reorientations of the acoustic beam inside the structure. Thus, by gradually modulating the parameters of a GRIN PC, one may create a focusing trajectory for the acoustic waves [9][10][11][12][13][14][15][16][17]. In principle, this trajectory can be analytically calculated, at least for some forms of the gradient.…”

Section: Introductionmentioning

confidence: 99%

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Beam path and focusing of flexural Lamb waves within phononic crystal-based acoustic lenses

et al. 2014

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We describe an analytical approach that allows calculating the trajectories of an elastic beam within a two-dimensional phononic crystal-based gradient index medium. The formalism takes into account the anisotropy along the lines of inclusions where the equi-frequency contours may depart from a circle. We then report on a numerical and experimental study of the focusing of flexural Lamb waves in gradient-indexed phononic crystals. The silicon/air heterostructures that we considered for this work features an index that is obtained through the modulation along one axis of either the diameter of the air inclusions or their spacing. In both cases, numerical and experimental results agree very well. The formalism that we have developed explains well the location, shape and size of the focus in either system. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. New J. Phys. 16 (2014) 063031 J Zhao et al New J. Phys. 16 (2014) 063031 J Zhao et al New J. Phys. 16 (2014) 063031 J Zhao et al 4 New J. Phys. 16 (2014) 063031 J Zhao et al 5 New J. Phys. 16 (2014) 063031 J Zhao et al New J. Phys. 16 (2014) 063031 J Zhao et al 7 New J. Phys. 16 (2014) 063031 J Zhao et al 9 New J. Phys. 16 (2014) 063031 J Zhao et al 13

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“…A promising alternative to this rather robust approach is a combination of less expensive femtosecond lasers operating at the telecommunication wavelength of 1.55 lm on the one hand, and ultrafast semiconductors based on InGaAs (Ref. 5) or organic crystals like 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) 6 on the other hand. DAST is mainly used in broadband THz setups.…”

mentioning

confidence: 99%

Ultrafast carrier response of Br+-irradiated In0.53Ga0.47As excited at telecommunication wavelengths

Fekete

Němec

Mics

et al. 2012

Journal of Applied Physics

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International audienceWe present results of infrared pump--terahertz probe experiments applied to a set of In0.53Ga0.47As films irradiated with heavy ions (Br+) at doses from 109 to 1012 cm−2. Photoexcitation at 1400 nm (0.89 eV) allowed us to characterize the response close to telecommunications' wavelengths whilst avoiding the intervalley carrier scattering observed when a shorter wavelength excitation is used. The excitation fluence was varied in our experiments in order to characterize the dynamics in detail: the lifetimes and mobilities of both electrons and holes were retrieved, and the trap filling and carrier diffusion were clearly observed. The In0.53Ga0.47As film irradiated by the dose of 1012 cm−2 exhibits simultaneously ultrashort electron lifetime (∼300 fs) and very high electron mobility (2800 cm2V−1s−1). These findings are particularly important for the design of terahertz emitters controlled by lasers operating at standard telecommunication wavelengths

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Optical phase detection in a 4-N,N-dimethylamino-4′-N′-methyl-stilbazolium tosylate crystal for terahertz time domain spectroscopy system at 1.55 μm wavelength

Cited by 20 publications

References 11 publications

THz Photoconductive Antennas Made From Ion-Bombarded Semiconductors

THz Photoconductive Antennas Made From Ion-Bombarded Semiconductors

Beam path and focusing of flexural Lamb waves within phononic crystal-based acoustic lenses

Ultrafast carrier response of Br+-irradiated In0.53Ga0.47As excited at telecommunication wavelengths

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