&lt;title&gt;Acousto-optics of semiconductor crystals and superlattices&lt;/title&gt;

Sapriel, J.; Renosi, P.

doi:10.1117/12.131920

Cited by 5 publications

(14 citation statements)

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“…L is length of the AO interactions. ξ is phase shift by the ultrasonic waves, which represents the intensity of AO interaction and can be written as [7] λ πµ ξ…”

Section: Coupled Wave Equationmentioning

confidence: 99%

Three-dimensional isotropic acousto-electro-optic modulator using potassium hydrogen phosphate

Pang

et al. 2005

SPIE Proceedings

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In this paper we researched principles of three-dimensional (3-D) isotropic acousto-electro-optic (AEO) modulator, including coupled wave equations and diffraction efficiency formula of the 3-D AEO effect. The AEO crystal is worn into a column of six side-faces. Three transducers are stuck on adjacent side-faces and they can produce three acoustic energy channels of 60° each other in acoustic plane. Direct current (DC) electrodes with central holes are plated on the end-faces. Through the hole, incident light propagates along axis of the column, which is perpendicular to the acoustic plane. So the acousto-optic (AO) effect must be Raman-Nath effect, it can realize 3-D light deflection. The DC electric field is supplied along the axis of the column too. So the electro-optic (EO) effect must be longitudinal, it can realize light modulation. We designed and made a 3-D isotropic AEO modulator of centre frequency 50 MHz using Potassium Hydrogen Phosphate (KDP) crystal, and measured its modulation curve of relative diffraction efficiency vs DC voltages. Measured results agree with theoretical calculation. Multi-dimensional AEO modulator has applications in multi-channel optic communication and optic signal processing.

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“…L is length of the AO interactions. ξ is phase shift by the ultrasonic waves, which represents the intensity of AO interaction and can be written as [7] λ πµ ξ…”

Section: Coupled Wave Equationmentioning

confidence: 99%

Three-dimensional isotropic acousto-electro-optic modulator using potassium hydrogen phosphate

Pang

et al. 2005

SPIE Proceedings

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“…The filter is aligned so that it will reject the deflected beam and pass the undeflected beam. The deflected beam will be turned on and off as the wave propagates across the crystal, and the amplitude of the beam emerging from the spatial filter will be modulated (3,4).…”

Section: Applicationsmentioning

confidence: 99%

“…(where A. and A are the wavelength of the optical wave and the sound wave, respectively), is less than one (3)(4)(5). The diffraction process (Figure 2a) has multiple orders, because the interaction length is relatively short and can be approximated as a thin grating (i.e., the diffraction spreading of the light between adjacent compression and rarefaction regions overlaps).…”

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confidence: 99%

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Acousto-Optic Devices: Optical Elements for Spectroscopy

Tran¹

1992

Anal. Chem.

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Seventy years ago, Brillouin theorized that light could be diffracted by an acoustic wave (1). This prediction was based on the fact that when an acoustic wave is propagated in a transparent material, it produces a periodic modulation of the index of refraction. The perturbation in the refractive index arises from the change in the number density of the acoustic medium induced by the compression and rarefaction of the traveling sound wave. As a consequence, the propagating acoustic wave produces a moving grating that will diffract portions of an incident light beam.This sound-light interaction phenomenon, which is called the acousto-optic interaction, was initially observed by Debye and Sears in 1932 (2). Early studies were limited to interactions of low-frequency acoustic waves with incoherent light sources in liquids and gases. As a result, the phenomenon had an impact primarily on the academic community; experimental results provided a basic understanding of the thermal and acoustic properties of liquids and gases.The first applications of the acousto-optic interaction did not appear until the 1960s. Since then, significant scientific and technological advances have occurred in optics, elec-INSTRUMENTATION

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“…Generally, the photoelastic effect (i.e. the dependence of the permittivity of a material on strain, induced by an acoustic wave) is considered to be the most important mechanism in transparent bulk solids with momentum conservation between the acoustic and electromagnetic waves governing various acousto-optical phenomena [21]. In complex nanostructures, like multilayered thin films, acoustic waves also modulate the positions of the internal interfaces and the size of the domains in the structure [22,23].…”

Section: Introductionmentioning

confidence: 99%

High-frequency acousto-optic effects in Bragg reflectors

Farmer¹,

Akimov²,

Gippius³

et al. 2014

Opt. Express

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Picosecond acoustic interferometry was used to study the acousto-optic properties of a distributed Bragg reflector (DBR) manufactured from two immiscible polymers (cellulose acetate and polyvinylcarbyzole). Picosecond strain pulses were injected into the structure and changes in its reflectance were monitored as a function of time. The reflectance exhibited single-frequency harmonic oscillations as the strain pulse traversed the DBR. A transfer matrix method was used to model the reflectance of the DBR in response to interface modulation and photo-elastic effects. This work shows that photo-elastic effects can account for the acousto-optic response of DBRs with acoustically matched layers. Yakovlev, and M. Bayer, "Laser mode feeding by shaking quantum dots in a planar microcavity," Nat. Photonics 6(1), 30-34 (2012). 42. Y. Léger, "Double magic coincidence in an optomechanical laser cavity," Physics 6, 6 (2013).

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<title>Acousto-optics of semiconductor crystals and superlattices</title>

Cited by 5 publications

References 0 publications

Three-dimensional isotropic acousto-electro-optic modulator using potassium hydrogen phosphate

Three-dimensional isotropic acousto-electro-optic modulator using potassium hydrogen phosphate

Acousto-Optic Devices: Optical Elements for Spectroscopy

High-frequency acousto-optic effects in Bragg reflectors

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