Plasmonic enhancement of mid- and far-infrared acousto-optic interaction [Invited]

Sopko, I. M.; Knyazev, G. A.

doi:10.1364/ao.57.000c42

Cited by 7 publications

(7 citation statements)

References 17 publications

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“…Consequently, it is of great importance to call for more researches on the AO properties of new materials. [ 186,187 ]…”

Section: Acousto‐optic Effect and Its Applications For 2d Materialsmentioning

confidence: 99%

“…[29,71,185,186] Nowadays, the development of AO devices has hit a bottleneck where high-quality acousto-optic materials (e.g., the figure of merit and acoustic attenuation) are in great demand. [186,187] Although traditional AO materials have been widely investigated include TiO 2 , TeO 2 , and As 2 S 3 [188] suitable for visible to near-infrared wavelength; GaAs, ZnTe, GaP, ZnS, and CdS suitable for far-infrared wavelength, and among others, there still limitations in the applications such as the AO devices operating in the gigahertz range. [186,189] Nevertheless, the unique atomically thin planar structure in 2D materials potentially enhances the AO properties, which provides a sensitive platform to fully interact with the acoustic stimulus for modulating the electronic band structures and optical properties of the host in a relatively high degree.…”

Section: D Materials With Acousto-optic Effectmentioning

confidence: 99%

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Tunable Optical Properties of 2D Materials and Their Applications

Ren

et al. 2020

Advanced Optical Materials

154

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unlimited possibilities in the improvement of the performances of optoelectronic devices. [19-23] Beyond that, the properties of 2D materials can be tuned in situ by using different approaches [24-26] to expand the functionalities of optoelectronic devices. Out of them, the tunability in their optical properties has attracted great interest over the past decades where researchers dedicated to discovering various tuning methods to realize desired outcomes. [27,28] More excitingly, owing to the unprecedented electronic properties, high stretchability, magnetism, and thermal conductivity of 2D materials, different tuning approaches such as electrical gating, external strain stimuli, a static magnetic field, surface acoustic waves (SAWs), and thermal heating can be simultaneously adopted to participate the light-matter interaction, leading to the tailored and synergetic optical response of 2D materials. [29] Table 1 illustrates a brief advantages and weaknesses analysis between different optical tuning approaches of 2D and non-2D materials. There is a huge potential to revolutionize the optoelectronic devices by incorporating 2D materials with tunable optical properties. [30,31] So far, researchers have achieved flagship milestones in this area where a diverse set of high-performance optical devices are realized including modulators, photodetectors, optical sources, and optical switches. [32] In this review, we primarily focus on the theoretical and experimental researches of optical effects causing by various external stimuli in 2D materials. In Section 2, 2D materials with electro-optic effect and its application will be discussed, followed by piezophototronic effect and its application in Section 3. In Section 4, 2D materials with magneto-optic effect and its application will be discussed. Then, acousto-optic (AO) effect and its application, and thermo-optic (TO) effect and its application will be discussed in Sections 4 and 5, respectively. In the last section, the conclusion and perspective will be provided. 2. Electro-Optic Effect and Its Applications for 2D Materials 2.1. 2D Materials with Electro-Optic Effect In a broad sense, electro-optic effect is about an optical property change in the materials when applying an electric field. As shown in Figure 1, the refractive index of the material can be tuned in the presence of electric field due to the variation of charge carrier density. [29] This effect involves several Recent efforts have been heavily devoted to the development of next-generation optoelectronic devices based on 2D materials, due to their unique optical properties that are distinctly different from those of bulk counterparts. Given that the feature of flexible tunability is highly desired, various approaches have been demonstrated to efficiently modulate the optical properties, eventually enabling peculiar functionalities or realizing high-performance nanoscale devices. Here, this review focuses on recent advances in tuning the optical properties of 2D materials by external stimuli including elec...

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“…Consequently, it is of great importance to call for more researches on the AO properties of new materials. [ 186,187 ]…”

Section: Acousto‐optic Effect and Its Applications For 2d Materialsmentioning

confidence: 99%

Section: D Materials With Acousto-optic Effectmentioning

confidence: 99%

Tunable Optical Properties of 2D Materials and Their Applications

Ren

et al. 2020

Advanced Optical Materials

154

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“…Many researchers focused on the application of the Otto configuration and concluded their research by using theoretical simulations without experimental results [ 13 , 14 , 15 , 16 ]. According to the development of micromachining technology, the Otto configuration-based SPR sensor systems have been experimentally realized [ 17 , 18 ]. Sopko et al proposed the concept of an acousto-optical device using Otto configuration-based SPR phenomenon with 10.6 μm wavelength [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…According to the development of micromachining technology, the Otto configuration-based SPR sensor systems have been experimentally realized [ 17 , 18 ]. Sopko et al proposed the concept of an acousto-optical device using Otto configuration-based SPR phenomenon with 10.6 μm wavelength [ 18 , 19 ]. Although their sensor system can be used to analyze dependencies of the reflective coefficient of the prism–air–metal system on the air-gap and dielectric permittivity, a relationship between the air-gap and resonance wavelength is not referred.…”

Section: Introductionmentioning

confidence: 99%

Air-Gap Interrogation of Surface Plasmon Resonance in Otto Configuration

et al. 2021

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In this study, a micromachined chip in Otto configuration with multiple air-gaps (1.86 μm, 2.42 μm, 3.01 μm, 3.43 μm) was fabricated, and the resonance characteristics for each air-gap was measured with a 980 nm laser source. To verify the variability of the reflectance characteristics of the Otto configuration and its applicability to multiple gas detection, the air-gap between the prism and metal film was adjusted by using a commercial piezoactuator. We experimentally verified that the SPR characteristics of the Otto chip configuration have a dependence on the air-gap distance and wavelength of the incident light. When a light source having a wavelength of 977 nm is used, the minimum reflectance becomes 0.22 when the displacement of the piezoactuator is about 9.3 μm.

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“…As a result, the differences between light incidence angle of the plasmon excitation and angle of the total internal reflection is negligible. This defines extremely narrow resonance shape [12], which is problematic for optimization of the device scheme but grants possibilities for high modulation depth [18]. Another approach is to utilize phononpolaritons in a high absorbent medium like silicon carbide [19].…”

Section: Introductionmentioning

confidence: 99%

Efficient Acousto-Optical Light Modulation at the Mid-Infrared Spectral Range by Planar Semiconductor Structures Supporting Guided Modes

et al. 2020

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Acousto-optical devices, such as modulators, filters or deflectors, implement a simple and effective way of light modulation and signal processing techniques. However, their operation wavelengths are restricted to visible and near-infrared frequency region due to a quadratic decrease of the efficiency of acousto-optical interaction with the wavelength increase. At the same time, almost all materials with high value of acousto-optic figure of merit are non-transparent at wavelengths larger than 5 µm, while the transparent materials possess significantly lower acousto-optic figure of merit. Here we propose and demonstrate by calculations how these limitations could be overcome using specially designed planar semiconductor structures supporting electromagnetic modes strongly coupled to the incident light in the Otto configuration. Such approach could be used for a novel efficient acousto-optical device operating in middle infrared range of 8-14 µm. Acoustic wave excited by a piezoelectric transducer in a semi-conductor prism is utilized to modulate the coupling coefficient of the incident light to the semiconductor structure which results in up to 100% modulation of the transmitted light at the spatial scale less than the ultrasound wavelength. It allows to utilize acoustic waves with short decay distance and therefore, it provides a unique possibility to achieve an efficient acousto-optical modulation at frequencies over several gigahertz, which are unreachable for traditional acousto-optics.

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Plasmonic enhancement of mid- and far-infrared acousto-optic interaction [Invited]

Cited by 7 publications

References 17 publications

Tunable Optical Properties of 2D Materials and Their Applications

Tunable Optical Properties of 2D Materials and Their Applications

Air-Gap Interrogation of Surface Plasmon Resonance in Otto Configuration

Efficient Acousto-Optical Light Modulation at the Mid-Infrared Spectral Range by Planar Semiconductor Structures Supporting Guided Modes

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