Design of far-infrared acousto-optic tunable filter based on backward collinear interaction

Voloshinov, V. B.; Porokhovnichenko, D. L.; Dyakonov, E. A.

doi:10.1016/j.ultras.2018.04.002

Cited by 11 publications

(5 citation statements)

References 11 publications

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“…The relative contributions of the two effects, for each of the acoustic cavity resonances, are plotted in Fig.8. The MB contribution dominates at all frequencies, except near the Brillouin frequency of silicon, where the AO interaction becomes phase-matched ( k acoustic = 2 k opt ) [24,25] and the optomechanical coupling can be significantly enhanced. The even-odd mode coupling can be clearly discerned in the high frequency modes (¿ 2.5 GHz) in Fig.4(a) (green and red arrows) where the modes alternate between finite and zero modulation.…”

Section: Discussionmentioning

confidence: 99%

“…8. The MB contribution dominates at all frequencies, except near the Brillouin frequency of silicon, where the AO interaction becomes phase-matched ( k acoustic = 2 k opt ) [24,25] and the optomechanical coupling can be significantly enhanced. The even-odd mode coupling can be clearly discerned in the high frequency modes (¿ 2.5 GHz) in Fig.…”

Section: Discussionmentioning

confidence: 99%

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High-frequency, resonant acousto-optic modulators fabricated in a MEMS foundry platform

Valle

Balram

2019

Opt. Lett.

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We report the design and characterization of high frequency, resonant acousto-optic modulators (AOM) in a MEMS foundry process. The doubly-resonant cavity design, with short (L∼10.5 µm) acoustic and optical cavity lengths, allows us to measure acousto-optic modulation at GHz frequencies with high modulation efficiency. In contrast to traditional AOMs, these devices rely on the perturbation induced by the displacement of cavity boundaries, which can be significantly enhanced in a suspended geometry. This platform can serve as the building block for fast 2D spatial light modulators (SLM), low-cost integrated free space optical links and optically enhanced low-noise RF receivers.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

High-frequency, resonant acousto-optic modulators fabricated in a MEMS foundry platform

Valle

Balram

2019

Opt. Lett.

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“…For conventional acousto-optic spectral systems, the collimating scheme is the most common and structurally simple scheme, and the optical path diagram is shown in Figure 1B. The adopted scheme is to filter the light directly using a single AOTF, which is also the basis of other schemes [26,27]. The light entering the optical system from the object under test is collimated by L0, the mutually parallel light is filtered by the AOTF, and then be focused on the CCD by the focusing lens L1.…”

Section: Collimating Schemementioning

confidence: 99%

Review of acousto-optic spectral systems and applications

2022

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Acousto-optic devices represented by acousto-optic tunable filters (AOTFs), have the advantages of wide wavelength range from the ultraviolet to the long-wave infrared and fast wavelength switching speed. Nowadays, acousto-optic spectral systems have become very important scientific instruments in laboratory. There are many factors to be considered when we choose different solutions for acousto-optic spectral systems, but there is no comprehensive analysis and summary of them. This paper explains the working principle of the acousto-optic devices and summarizes the most common optical schemes for acousto-optic spectral systems. We also analyzed their characteristics of application conditions. In addition, specific applications of acousto-optic spectral systems in some common fields are presented.

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“…It is analytically shown that, with decreasing thickness of the first layer, the frequency range broadens, in which the phase of the reflected light does not change and the reflectance approaches 100% [19]. The PPAM properties can also be observed in acousto-optical cells [26] as well as in chiral thin structured films [27].…”

Section: Introductionmentioning

confidence: 98%

Chiral Optical Tamm States at the Interface between an All-Dielectric Polarization-Preserving Anisotropic Mirror and a Cholesteric Liquid Crystal

et al. 2019

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As a new localized state of light, the chiral optical Tamm state exists at the interface between a polarization-retaining anisotropic mirror and a substance with optical activity. Considering a hybrid structure comprising a metal-free polarization-preserving mirror and a cholesteric liquid crystal, we highlight the high Q factor arising from the all-dielectric framework. The intensity of localized light decreases exponentially with increasing distance from the interface. The penetration of the field into the cholesteric liquid crystal is essentially prohibited for wavelengths lying in the photonic bandgap and close to the cholesteric pitch length. The dielectric mirror has its own photonic bandgap. The energy transfer along the interface can be effectively switched off by setting the tangential wave vector to zero. The spectral behavior of the chiral optical Tamm state is observed both as reflection and transmission resonance. This Fano resonance is analogous to the Kopp-Genack effect. Our analytics are well in line with precise calculations, which may pave a new route for the future development of intelligent design for laser and sensing applications.

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Design of far-infrared acousto-optic tunable filter based on backward collinear interaction

Cited by 11 publications

References 11 publications

High-frequency, resonant acousto-optic modulators fabricated in a MEMS foundry platform

High-frequency, resonant acousto-optic modulators fabricated in a MEMS foundry platform

Review of acousto-optic spectral systems and applications

Chiral Optical Tamm States at the Interface between an All-Dielectric Polarization-Preserving Anisotropic Mirror and a Cholesteric Liquid Crystal

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