With the development of radio frequency technique, explosive growth transmitted data in 5G era puts higher requirements on surface acoustic wave (SAW) filter bandwidth. In this work, 15°YX-LiNbO3(LN)/SiO2/Si multilayer structure was proposed, where both LN and SiO2 films possess uniform thickness interfaces between are quite clear. hierarchical cascading algorithm, spurious resonance that resulted from Rayleigh mode minimized through modulation Cu electrode thickness. One-port resonators...

The rapid development of the fifth-generation (5G) wireless system is driving strong demand for high-performance radio frequency filters. This work studies shear horizontal surface acoustic wave (SAW) devices using 15°-rotated Y-cut X-propagating (15°Y-X) LiNbO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> /SiO xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /SiC multilayered substrates. Single-crystalline 15°Y-X films are bonded to...

To study the size effect of AlGaInP red micro-LEDs on silicon substrate, we fabricated five with different pixel sizes (160 × 160, 80 80, 40 40, 20 20, and 10 µm2) studied their electrical optical properties. Smaller have smaller leakage current larger series resistance can withstand higher density without crowding effect. Due to perimeter-to-area ratio small-sized micro-LEDs, non-radiative recombination increases, which leads a lower EQE. But alleviate problem high-current efficiency droop....

A LiNbO3 (LN)/SiO2/Si multilayered structure was recently reported as a new platform for achieving wideband radio frequency (RF) filters. However, the in-band ripples in filters resulting from spurious Rayleigh mode lead to deteriorated performance, and thus, wide elimination window (REW) is highly desired realizing spurious-free surface acoustic wave (SAW) with design space good process tolerance. Here, we investigated suppression on LN/SiO2/Si theoretically experimentally through...

The 5G communication system has experienced a substantial expansion of the spectrum, which poses higher requirements to radio frequency (RF) filters in enhancing their operating frequencies and bandwidths. To this end, work focused on solving filtering scheme for challenging n77 n78 bands successfully implemented corresponding spurious-free surface acoustic wave (SAW) exploiting large-coupling shear horizontal (SH) modes based X-cut LiNbO3 (LN)/silicon carbide (SiC) heterostructure. Here, we...

Vibrational spectroscopic imaging techniques, based on infrared absorption or Raman scattering, allow for noninvasive chemically specific visualization of biological systems. The and modalities with different selection rules provide complementary information. Specifically, microscopy provides strong signals in the fingerprint region, but suffers from low spatial resolution. submicrometer resolution, requires a long acquisition time. We developed system that combines strengths both techniques...

In this article, 2000 PPI red silicon-based AlGaInP micro-LED arrays were fabricated and investigated. The epilayer was transferred onto the silicon substrate via In-Ag bonding technique an lift-off process. with a high thermal conductivity could provide satisfactory heat dissipation, leading to that had stable emission spectrum increasing current density from 20 420 A/cm 2 along red-shift of peak position 624.69 627.12 nm ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Enhancing the central frequency (fc) and bandwidth (BW) reducing insertion loss (IL) are essential steps in surface acoustic wave (SAW) filter applications 5G era. With this mind, we construct a 32° Y-X LiNbO3(300 nm)/SiO2(300 nm)/poly-Si(1 μm)/Si heterostructure to avoid both leakage through waveguide effect electrical introduction of poly-Si layer. By separately modulating electrode thicknesses series parallel resonators, spurious modes can be mitigated out passband, preventing them from...

In this letter, highly (0002) oriented ZnO piezoelectric films were deposited on high acoustic velocity SiC substrates. Surface wave (SAW) devices ZnO/SiC layered structure operating in the fundamental mode with frequency to 7-GHz range successfully fabricated for first time. The comprehensive experimental and theoretical investigations about phase velocities Vp, electromechanical coupling coefficients K <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

As an essential functional block in radio frequency (RF) front-ends, surface acoustic wave (SAW) filters with large fractional bandwidth (FBW), high center ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$f_{c}$ </tex-math></inline-formula> ), and low loss are highly sought-after 5G new (NR). To address this end, 32°Y-X LiNbO3/SiO2/Si heterostructure electromechanical coupling coefficient of 23% was...

PQDs are promising color converters for micro-LED applications. Here we report the micropore filling fabrication of high resolution patterned with a pixel size 2 μm using template SU8 micropores.

Improving frequency and bandwidth is the essential path for surface acoustic wave (SAW) filter to keep its leadership in 5G or sub-6G system. In this work, we present high longitudinal leaky SAW (LLSAW) devices based on 128° <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${Y}$ </tex-math></inline-formula> -90° notation="LaTeX">${X}$ LiNbO3/160° Quartz structure, whose parameters were optimized through...

Quartz tuning fork (QTF)-based techniques of photoacoustic spectroscopy and thermoelastic play a significant role in trace gas sensing due to unique high sensitivity compactness. However, the stability both remains plagued by inevitable unpredictable laser power variation demodulation phase variation. Herein, we investigate change QTF when integrating for enhanced sensing. By demonstrating harmonic phase-sensitive methane detection as an example, achieve stable measurement at varying...

Photodetectors with broad spectral response and high responsivity demonstrate significant potential in optoelectronic applications. This study proposes a Si/Ge avalanche photodiode featuring nanostructures that enhance light absorption. By optimizing the device epitaxial structure these nanostructures, wide from 0.4 to 1.6 μm is achieved. The results introducing surface photon-trapping nanoholes SiO2 reflective grating increases average absorptivity 0.64 0.84 0.4-1.1 range 0.31 0.56 1.1-1.6...

In this study, quantum dot color conversion layers (QDCCLs) for full-color micro-LED display were successfully fabricated using microfluidics to conduct red and green perovskite dots the position of pixel array. The QDCCL with size 200 × μm sub-pixel 140 50 was achieved. Perovskite high yield narrow full width at half-maximum used achieve a wide gamut, which 131% National Television Systems Committee standard. proposed microfluidics-based featured easy fabrication, low cost, performance,...

The development of 5G has put forward a higher demand for filters, and the purpose this work is fabricating surface acoustic wave (SAW) filters with excellent temperature stability high power handling using LiTaO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> /SiC bonded wafers. SAW resonators different wavelengths are fabricated on /SiC, /Si, bulk as well. We evaluate these resonators, concluding that bilayer substrates can enhance...

This paper reports on the design and fabrication of a ${48} \times {48}$48×48 full-color pixelated addressable light-emitting diode silicon (LEDoS) micro display. The metallization pattern was designed fabricated substrate, while red, green, blue monochromatic LEDs were integrated substrate using transfer printing. are flip-chip structures in which red transfer, mesa etching, metal deposition, chip dicing. integration process does not require wire bonding, reduces pixel size increases speed....

This research aims to overcome the tradeoff between bandwidth, temperature stability of frequency, and loss in surface acoustic wave filters. A novel multilayered structure, SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /Cu-grating/ <inline-formula xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$15^{\circ }~{Y}$ </tex-math></inline-formula> - notation="LaTeX">${X}$ LiNbO...

As a promising material alternative, lithium niobate (LN)-based heterostructure has recently received growing recognition in the field of radio frequency (RF) wideband filtering. However, corresponding surface acoustic wave (SAW) devices still encounter spurious transverse modes interference and deficient thermal stability, which hinder their capability to process already crowded spectrums. This work presents spurious-free near-zero drift shear horizontal SAW (SH-SAW) resonators utilizing an...

The use of a dual-interference channels static Fourier transform imaging spectrometer based on stepped micro-mirror (D-SIFTS) for environmental gas monitoring has the advantages high throughput, compact structure, and stable performance. It also characteristics both broad spectral range resolution. However, its unique structural features bring many problems subsequent data processing, mainly including complex distribution interference data, low signal-to-noise ratio (SNR) infrared scene...