Plasmonic nanoantenna hydrophones

Maksymov, Ivan S.; Greentree, Andrew D.

doi:10.1038/srep32892

Cited by 17 publications

(56 citation statements)

References 52 publications

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“…Thus, for w = 300 nm the transmission will be tuned from ∼ 700 nm (at the lowest bubble radius) to ∼ 510 nm (at the largest radius), which is confirmed by 3D finite-difference time-domain (FDTD, see [26]) simulations (solid and dashed curves in Fig. 2).…”

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confidence: 56%

“…(1) we can obtain the frequency and amplitude of P (t). This functionality may be used in the optical sensing of ultrasound [26]. Our discussion remains valid when the pulsating bubble becomes aspherical, which can happen, for example, because of the impact of the hole.…”

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confidence: 99%

“…Bubbles may also operate inside a liquid-filled holey optical fibre [40] or a liquid-filled dielectric slot waveguide [41] leading to novel opportunities for biosensing. The dependence of the bubble radius on ultrasound pressure and frequency may also be exploited in optical hydrophones [26]. Such devices may be used to detect bubbles in difficult to reach places such as the human brain, where gas bubbles are believed to play an important role in the Alzheimer's disease [42].…”

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confidence: 99%

“…Because compressibility effects are generally negligible in water [26], we solve the Rayleigh-Plesset equation that models a bubble in an inviscid and incompressible liquid of constant density ρ = 1000 kg/m 3 :…”

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confidence: 99%

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Acoustically tunable optical transmission through a subwavelength hole with a bubble

Maksymov

Greentree

2017

Phys. Rev. A

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Efficient manipulation of light with sound in subwavelength-sized volumes is important for applications in photonics, phononics and biophysics, but remains elusive. We theoretically demonstrate the control of light with MHz-range ultrasound in a subwavelength, 300 nm wide water-filled hole with a 100 nm radius air bubble. Ultrasound-driven pulsations of the bubble modulate the effective refractive index of the hole aperture, which gives rise to spectral tuning of light transmission through the hole. This control mechanism opens up novel opportunities for tuneable acousto-optic and optomechanical metamaterials, and all-optical ultrasound transduction.

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confidence: 56%

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confidence: 99%

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confidence: 99%

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Acoustically tunable optical transmission through a subwavelength hole with a bubble

Maksymov

Greentree

2017

Phys. Rev. A

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“…Thus, an initially sinusoidal sound wave undergoes deformations as it propagates, which implies that its initial monochromatic spectrum [ Fig. 2(b)] gets enriched with new higher harmonic frequencies [91,92] [ Fig. 2(c)].…”

Section: Origin Of Nonlinear Acoustic Effectsmentioning

confidence: 99%

Coupling light and sound: giant nonlinearities from oscillating bubbles and droplets

Maksymov

Greentree

2019

Nanophotonics

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Nonlinear optical processes are vital for fields including telecommunications, signal processing, data storage, spectroscopy, sensing, and imaging. As an independent research area, nonlinear optics began with the invention of the laser, because practical sources of intense light needed to generate optical nonlinearities were not previously available. However the high power requirements of many nonlinear optical systems limit their use, especially in portable or medical applications, and so there is a push to develop new materials and resonant structures capable of producing nonlinear optical phenomena with low-power light emitted by inexpensive and compact sources. Acoustic nonlinearities, especially giant acoustic nonlinear phenomena in gas bubbles and liquid droplets, are much stronger than their optical counterparts. Here, we suggest employing acoustic nonlinearities to generate new optical frequencies, thereby effectively reproducing nonlinear optical processes without the need for laser light. We critically survey the current literature dedicated to the interaction of light with nonlinear acoustic waves and highly-nonlinear oscillations of gas bubbles and liquid droplets. We show that the conversion of acoustic nonlinearities into optical signals is possible with low-cost incoherent light sources such as lightemitting diodes, which would usher new classes of low-power photonic devices that are more affordable for remote communities and developing nations, or where there are demanding requirements on size, weight and power. . 1: (a) Generation of new optical frequencies via a nonlinear optical interaction. High-power monochromatic laser light interacts with the nonlinear optical medium, e.g. a dielectric microresonator, to generate new optical frequencies [9]. (b, c) The nonlinear properties of sound can be used to generate optical nonlinearities without the need for high-power laser light. Low-power light couples to a sound wave via a deformable fluid, e.g. gas bubble or liquidmetal nanoparticle, exploiting strong nonlinear acoustic effects. This converts acoustic frequencies to the optical domain, effectively reproducing the result of the nonlinear optical interaction in (a). Images from www.freeimages.com and www.dreamstime.com. FIG

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Controlling Light, Heat, and Vibrations in Plasmonics and Phononics

Cunha

Guo

Valle

et al. 2020

Advanced Optical Materials

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more than a 100 years to the beginning of the twentieth century. [1] However, owing to the recent improvements in nanofabrication and characterization techniques, it was only in the last decades that plasmonics emerged as a prolific area of applied optics. Phononics is the field of condensed matter physics that studies collective vibrational modes of matter (phonons) as means to carry energy (heat) and information (vibration and sound). Beginning with atomic scale models describing the lattice dynamics, its theoretical roots go back to the foundations of the field of condensed matter physics itself before the first half of the twentieth century [2,3]. Analogously to plasmonics, the ability to fabricate structures with subm µ features is now opening possibilities for exploiting phonon propagation hence promoting a renewed interest in the phononic field. Even more importantly, the nowadays advanced micro-and nano-fabrication technology enables the actual realization of opto-thermo-mechanical nanodevices [4,5] where the interaction between photons, electrons, and phonons can be properly investigated and exploited. Starting from the seminal work of Ritchie in 1957, [6] numerous studies have been performed on systems supporting plasmonic effects, such as metallic slits or perforated metallic films together with hybrid structures formed by metal and dielectric. [7] Plasmonic nanostructures have especially attracted a lot of attention for their ability to couple with light whose Plasmonic nanostructures have attracted considerable attention for their ability to couple with light and provide strong electromagnetic energy confinement at subwavelength dimensions. The absorbed portion of the captured electromagnetic energy can lead to significant heating of both the nanostructure and its surroundings, resulting in a rich set of nanoscale thermal processes that defines the subfield of thermoplasmonics with applications ranging from nanochemistry and nanobiology to optoelectronics. Recently, phononic nanostructures have started to attract attention as a platform for manipulation of phonons, enabling control over heat propagation and/or mechanical vibrations. The complex interaction phenomena between photons, electrons, and phonons require appropriate modelling strategies to design nanodevices that simultaneously explore and exploit the optical, thermal, and mechanical degrees of freedom. Examples of such devices are micro-and nanoscale opto-thermomechanical systems for sensing, imaging, energy conversion, and harvesting applications. Here, an overview of the fundamental theory and concepts crucial to the modelling of plasmo-phonon devices is provided. Particular attention is given to micro-and nanoscale modelling frameworks, highlighting their validity ranges and the experimental works that contributed to their validation and led to compelling applications. Finally, an open-ended outlook focused on emerging applications at the intersection between plasmonics and phononics is presented.

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Plasmonic nanoantenna hydrophones

Cited by 17 publications

References 52 publications

Acoustically tunable optical transmission through a subwavelength hole with a bubble

Acoustically tunable optical transmission through a subwavelength hole with a bubble

Coupling light and sound: giant nonlinearities from oscillating bubbles and droplets

Controlling Light, Heat, and Vibrations in Plasmonics and Phononics

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