Optical Properties of Single-Crystal Paratellurite (Te<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>)

Uchida, Naoya

doi:10.1103/physrevb.4.3736

Cited by 196 publications

(61 citation statements)

References 21 publications

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“…2a-d, a monotonous increase with frequency can be observed for both the index of refraction and the absorption coefficient data for both polarizations. In the frequency range examined, the extraordinary index of refraction values are larger than those [4]. Comparing the dotted curves of Fig.…”

Section: Resultsmentioning

confidence: 90%

“…To avoid the absorption of water vapor, nitrogen gas was circulated in the spectrometer keeping the humidity around 7 % [12]. Because of the well-known birefringence of α-TeO 2 in the visible frequency range [4], measurements were performed with beam polarization both parallel (extraordinary polarization) and perpendicular (ordinary polarization) to the optical axis [001] of the crystal. Since the polarization of the THz antenna source was not perfectly linear, a week beating-like modulation [13,14] was observed in the spectra.…”

Section: Measurement Methodsmentioning

confidence: 99%

“…Single crystals are colorless and transparent in the 0.33-6.5 μm region [3]. It is a positive uniaxial material showing optical activity for light propagating along the optical axis [4] and has a large second-order nonlinear optical coefficient in the transparent frequency region (values of d 14 = 0.59 pm/V [5] or d 14 = 0.69 pm/V [6] at 1064 nm). Nonlinear optical properties of the material are also discussed in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Index of Refraction and Absorption Coefficient Spectra of Paratellurite in the Terahertz Region

Unferdorben

Buzády

Hebling

et al. 2016

J Infrared Milli Terahz Waves

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Index of refraction and absorption coefficient spectra of pure paratellurite (α-TeO 2 ) crystal as a potential material for terahertz (THz) applications were determined in the 0.25-2 THz frequency range at room temperature by THz time domain spectroscopy (THz-TDS). The investigation was performed with beam polarization both parallel (extraordinary polarization) and perpendicular (ordinary polarization) to the optical axis

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Section: Resultsmentioning

confidence: 90%

Section: Measurement Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Index of Refraction and Absorption Coefficient Spectra of Paratellurite in the Terahertz Region

Unferdorben

Buzády

Hebling

et al. 2016

J Infrared Milli Terahz Waves

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show abstract

“…The semi-collinear interaction was realized using an extraordinary polarized optical beam. Index of refraction for this beam in the infrared region was equal to n = 2.32 [22]. The acoustooptic gure of merit in the examined regime of interaction was 3 times as large as compared to that in fused silica and was equal to M 2 = 4.6 × 10…”

Section: Experimental Investigation Of Semi-collinear Interactionmentioning

confidence: 82%

New Acousto-Optic Regime of Interaction in Media Possessing Strong Elastic Anisotropy

2015

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We present results on theoretical and rst experimental investigation of a new regime of acousto-optic interaction existing in acoustically anisotropic medium. We dened the new regime as semi-collinear or mixed interaction since it combined properties of the traditional non-collinear diraction and the pure collinear interaction. The peculiar phenomenon was registered in the tellurium dioxide crystal due to the extremely strong elastic anisotropy of the material. Application of a specic cut of the crystal provided observation of the eect in the middle infrared at the optical wavelength 3.39 µm and at the acoustic frequencies limited to 300 MHz. The observed interaction was characterized by a non-collinear propagation of incident light with respect to acoustic energy ow and simultaneously a collinear propagation of diracted radiation along the acoustic energy ow. A brief theoretical analysis of the interaction based on wave vector diagrams and two-dimensional coupled wave equations is included in the presentation. Finally, we describe in the paper, the setup and basic details of the carried out acousto-optic experiment.

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“…The AOTF is optically tuned for the wavelength octave of 600 to 1200 nm, corresponding to an RF range of 156 to 70 MHz. It is made from tellurium dioxide (TeO 2 ), a birefringent crystal with indices of refraction at 800 nm of 2.226 and 2.373 for the ordinary and extraordinary modes respectively (Uchida, 1971). The acousto-optic diffraction angle varies as the filtered wavelength is changed, so in order to achieve an essentially constant diffraction angle the rear surface of the crystal is cut at a specific angle, such that the refraction at this final surface compensates for the angular change with wavelength.…”

Section: Acousto-optical Tunable Filtermentioning

confidence: 99%

The Aerosol Limb Imager: acousto-optic imaging of limb-scattered sunlight for stratospheric aerosol profiling

et al. 2016

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Abstract. The Aerosol Limb Imager (ALI) is an optical remote sensing instrument designed to image scattered sunlight from the atmospheric limb. These measurements are used to retrieve spatially resolved information of the stratospheric aerosol distribution, including spectral extinction coefficient and particle size. Here we present the design, development and test results of an ALI prototype instrument. The longterm goal of this work is the eventual realization of ALI on a satellite platform in low earth orbit, where it can provide high spatial resolution observations, both in the vertical and cross-track. The instrument design uses a large-aperture acousto-optic tunable filter (AOTF) to image the sunlit stratospheric limb in a selectable narrow wavelength band ranging from the visible to the near infrared. The ALI prototype was tested on a stratospheric balloon flight from the Canadian Space Agency (CSA) launch facility in Timmins, Canada, in September 2014. Preliminary analysis of the hyperspectral images indicates that the radiance measurements are of high quality, and we have used these to retrieve vertical profiles of stratospheric aerosol extinction coefficient from 650 to 1000 nm, along with one moment of the particle size distribution. Those preliminary results are promising and development of a satellite prototype of ALI within the Canadian Space Agency is ongoing.

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Optical Properties of Single-Crystal Paratellurite (TeO2)

Cited by 196 publications

References 21 publications

Index of Refraction and Absorption Coefficient Spectra of Paratellurite in the Terahertz Region

Index of Refraction and Absorption Coefficient Spectra of Paratellurite in the Terahertz Region

New Acousto-Optic Regime of Interaction in Media Possessing Strong Elastic Anisotropy

The Aerosol Limb Imager: acousto-optic imaging of limb-scattered sunlight for stratospheric aerosol profiling

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