“…This strain generates shear stress, which translates into an amplified mechanical wave propagating across the material's surface in the context of SAW. Therefore, as the applied voltage increases, the piezoelectric conversion intensifies, leading to a larger SAW response characterized by enhanced wave strength and propagation [ 34 , 39 ]. Fig.…”
Section: Resultsmentioning
confidence: 99%
“…The device consists of 40 fingers, each with a width of 12.5 µm and is 12.5 µm apart. The designated target resonant frequency is 750 MHz [ 34 ]. Figure 1 b shows the 3-dimensional device structure consisting of a plasmonic waveguide and two IDTs.…”
Enhancement of nanoscale confinement in the subwavelength waveguide is a concern for advancing future photonic interconnects. Rigorous innovation of plasmonic waveguide-based structure is crucial in designing a reliable on-chip optical waveguide beyond the diffraction limit. Despite several structural modifications and architectural improvements, the plasmonic waveguide technology is far from reaching its maximum potential for mass-scale applications due to persistence issues such as insufficient confined energy and short propagation length. This work proposes a new method to amplify the propagating plasmons through an external on-chip surface acoustic signal. The gold–silicon dioxide (Au-SiO2) interface, over Lithium Niobate (LN) substrate, is used to excite propagating surface plasmons. The voltage-varying surface acoustic wave (SAW) can tune the plasmonic confinement to a desired signal energy level, enhancing and modulating the plasmonic intensity. From our experimental results, we can increase the plasmonic intensity gain of 1.08 dB by providing an external excitation in the form of SAW at a peak-to-peak potential swing of 3 V, utilizing a single chip.
“…This strain generates shear stress, which translates into an amplified mechanical wave propagating across the material's surface in the context of SAW. Therefore, as the applied voltage increases, the piezoelectric conversion intensifies, leading to a larger SAW response characterized by enhanced wave strength and propagation [ 34 , 39 ]. Fig.…”
Section: Resultsmentioning
confidence: 99%
“…The device consists of 40 fingers, each with a width of 12.5 µm and is 12.5 µm apart. The designated target resonant frequency is 750 MHz [ 34 ]. Figure 1 b shows the 3-dimensional device structure consisting of a plasmonic waveguide and two IDTs.…”
Enhancement of nanoscale confinement in the subwavelength waveguide is a concern for advancing future photonic interconnects. Rigorous innovation of plasmonic waveguide-based structure is crucial in designing a reliable on-chip optical waveguide beyond the diffraction limit. Despite several structural modifications and architectural improvements, the plasmonic waveguide technology is far from reaching its maximum potential for mass-scale applications due to persistence issues such as insufficient confined energy and short propagation length. This work proposes a new method to amplify the propagating plasmons through an external on-chip surface acoustic signal. The gold–silicon dioxide (Au-SiO2) interface, over Lithium Niobate (LN) substrate, is used to excite propagating surface plasmons. The voltage-varying surface acoustic wave (SAW) can tune the plasmonic confinement to a desired signal energy level, enhancing and modulating the plasmonic intensity. From our experimental results, we can increase the plasmonic intensity gain of 1.08 dB by providing an external excitation in the form of SAW at a peak-to-peak potential swing of 3 V, utilizing a single chip.
The most vital step in the development of novel and existing surface acoustic wave (SAW)-based sensors and transducers is their design and optimization. Demand for SAW devices has been steadily increasing due to their low cost, portability, and versatility in electronics, telecommunications, and biosensor applications. However, a full characterization of surface acoustic wave biosensors in a three-dimensional (3D) finite element model has not yet been developed. In this study, a novel approach is developed for analyzing shear horizontal Love wave resonator devices. The developed modeling methodology was verified using fabricated devices. A thorough analysis of the 3D model and the experimental device was performed in this study including scattering parameters (S-parameters), reflection coefficient parameters, transmission parameters, and phase velocity. The simulated results will be used as a design guideline for future device design and optimization, which has thus far resulted in close matching between prediction and experimental results. This manuscript is the first to demonstrate a 3D finite element model to correlate the sensitivity of the SAW device with the magnitude of the phase shift, the real and imaginary part of the response, insertion loss, and the frequency shift. The results show that the imaginary part of the response shift has a higher sensitivity compared to other parameters.
“…The boundary condition of the solid and acoustic field was PML to absorb acoustic waves. For the acoustic radiation force, the continuum equation of motion and strain-mechanical displacement relations are used to calculate the vibration displacement of the solid [50]. Simultaneously, based on the structure-acoustic interactive simulation [51], the continuity equation, the Navier-Stokes equation, and the energy equation were used to calculate the first-order pressures and first-order velocity of the acoustic field.…”
We propose an on-chip integrated hybrid tweezer that can simultaneously apply optical and acoustic forces on particles to control their motions. Multiple potential wells can be formed to trap particles, and the acoustic force generated by an interdigital transducer can balance the optical force induced by an optical waveguide. For example, by driving the waveguide with an optical power of 100 mW and the interdigital transducer with a voltage of 1.466 V, the particle with a refractive index of 1.4 and a diameter of 5 μm (similar to yeast cells) can be stably trapped on the waveguide surface, and its trapping position is controllable by changing the optical power or voltage.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
