Session Index

In this study, we design and fabricate a micro-resonator "cat-flap" suspended in an optical cavity as a negative dispersion filter with sub-millimeter scale micromirrors supported by nanometer-thickness flexures. Our goal is to use the ANSYS simulation to optimize the cat-flap and develop fabrication process to increase the quality factor.

 

The transparent VO2 nanoparticle film (Tlum = 93.3%) with the excellent solar modulation (ΔTsol = 6.1%) was successfully fabricated on the quartz substrate which improves the drawback of the VO2 film with brownish-yellow color. Its thermochromic property is expected to be a promising material for smart window applications.

 

A novel silicon surface passivation technique using supercritical CO2 fluid with oxidant (H2O2) is proposed. The treated double-sided Si surfaces were further passivated by depositing a thin n-type poly-Si layer using VHF-PECVD system. The carrier lifetime of the silicon surface after the passivation of the poly-Si/SiOx stack is 1.23 ms.

 

The transparent conductive ZnO/Ag/ZnO multilayers were deposited on flexible PI substrate by HiPIMS in low temperature without additional heating. An excellent transparent in visible wavelength and lowest resistivity were obtained in 88% and 5.5x10-5 Ωcm, respectively. The performance of vertical LED was compared before and after bonding using the multilayers.

 

All-inorganic perovskite has been widely used in various fields such as light emitting diode, solar cells, and memory devices. In this work, the resistive switching memory with a structure of ITO/CsPbBr3/Au showed typical bipolar resistive switching characteristic with high ON/OFF ratio (>103) , large repeat cycle(>200).

 

Lossy mode resonance effect combined with D-shaped multimode fiber was used to fabricate a temperature and humidity fiber sensor. The sensitivity of the temperature sensor is 1.2 nm/°C in the range of 30 to 60°C. The relative humidity sensitivity is 1.0 nm/RH% in the relative range of RH30% to RH60%.

 

The polymer luminescent materials Poly(9-vinylcarbazole) are doped in quantum dot light emitting diode which let the excess electrons form excitons with the injected holes from the hole transport layer, and the performance is enhanced by Förster resonance energy transfer. The maximum of luminance and efficiency reached to 69055cd/m2 and 6.5cd/A.

 

In this work, we present that by moderating AIZTO TFTs by annealing at different temperatures and annealing time, the electrical performance enhanced. Annealing with oxygen gas atmosphere could eliminate the oxygen vacancy in the channel and suppress the leakage current phenomenon. These advantages allow it to develop next-generation display.

 

We proposed a soil moisture sensor using fiber side-polishing and RF magnetron sputtering techniques. Tin oxide film was coated on the D-shaped multi-mode fibers to make a high sensitivity fiber sensor. Lossy mode resonance effect was used to detect the soil moisture. The sensitivity of 2.15 nm/RH% was achieved.

 

In this work, the metal-oxide TFT (thin-film transistor) biosensor integrated with a microfluidic channel was developed to investigate biochemical reaction kinetics. Using the malate-aspartate shuttle as an example, we established the correlation between the molecular diffusion behaviors in the microfluidic channel and the TFT current responses.

 

The authors report the deposition of an (AlxGa1-x)2O3 amorphous thin film on sapphire substrates by sputter deposition. An amorphous deep UV (Al0.12Ga0.88)2O3 photodetector, with a cutoff wavelength at 230 nm, was also fabricated.

 

Obliquely bideposition was used to deposit silver nano-zigzag arrays with different sizes. When the nano-zigzag array was illuminated with electromagnetic wave, electrical field was enhanced around the corners of the zigzag. The hot spots are found to support the SERS signals in measurement.

 

A highly reliable encapsulation method was developed for flexible Micro LED. The technology implemented on flexible TEG was loaded on testing module with a folding radius of 5 mm.

 

A birefringent polymer transducer was used for the hydrochloric acid concentration measurements in a common path heterodyne interferometer. The achievable measurement resolutions of RI and concentration are 6.94×10-6 RIU and 16.7 ppm, respectively.

 

In this work, glancing angle deposition was applied to deposit an ultra-thin nanoparticle array on a Bragg mirror. The transmission spectrum shows that the Tamm plasmon wave was excited at a wavelength of 578 nm. It is demonstrated that a surface wave has been excited underneath the nanoparticles.

 

We investigate the effect of thermal annealing on the structural and electrical properties of 80-nm-thick Bismuth (Bi) thin films with grains. The thermal process brings Bi thin film greater magnetoresistance ratio (MR) and carrier mobilities due to improved material crystallinity.

 

Aluminum oxynitride films were prepared by high power impulse magnetron sputtering and deep oscillation magnetron sputtering. The influence of processes on crystalline structures, optical properties and surface roughness of films were investigated by spectroscopic elliposmeter and UV-VIS-NIR spectrometer.

 

Thermochromic VO2 and W-VO2 films were prepared by HiPIMS with substrate temperature at 300 °C. The transition temperature of VO2 and W-VO2 films were 68 °C and 46 °C, respectively. The thermochromic properties and optical constants of VO2 and W-VO2 were analyzed by spectrometer and ellipsometer.

 

We have studied the color discriminations of human test experiments before and after wearing a notch filter, which has a 20 nm full-width at half maximum (FWHM), 8.5% low transmittance at the reference wavelength of 580 nm.

 

Anti-glare coatings for electronic device screens with low sparkle were prepared via the sol-gel process using spray methods. Simulation was used to predict the influence of the surface morphology on the sparkle value. The sparkle value was optimized at the appropriate diameter.

 

In terms of 3-D scanning, the most difficult thing to overcome is to scan metal objects. High Dynamic Range (HDR) is a suitable way to solve this problem. The main purpose of this paper is to optimize HDR by automatically calculation of the best exposure time.

 

We present a simple proprietary purification system for the synthesis of high-quality perovskite CsPbBr3 quantum dots with high photoluminescence quantum yield by introducing purification solvents, that is, ethyl acetate, ethyl acetate:hexane, acetone, acetone:hexane into a crude solution. Optimal material and light characteristics were exhibited with the ethyl acetate:hexane purification solvent.

 

The time response behavior of low-temperature polycrystalline silicon (LTPS) thin-film transistors (TFTs) to the X-ray irradiation pulse with different frequencies is analyzed. The formulas for excited and recovering behaviors are proposed to be possibly used for the circuit performance in real situation. The predicted and measured results fit fairly well.

 

A hydrogen-bonded polymer cholesteric liquid crystal (PCLC) is proposed as a metal sensor. Calcium ion makes the crosslinking degree of the PCLC increase and then causes the PCLC pitch shrink and its reflected wavelength blue-shift. The sensing performance is studied by measuring the wavelength shift induced by metal ion.

 

In this study, the leaf-structures are patterned onto thin-film LSCs using inorganic phosphor .It is found that the efficiencies of thin film LSCs covered with replica layers of Bauhinia and Epipremnum aureum are higher than the one with flat encapsulation layer.

 

Nowadays, the applications of nanostructure have increased. Because of the characteristics of the stable chemical structure and photoelectric properties, TiO2 are often used in our life. In this study, TiO2 nanostructures were prepared by hydrothermal method and the non-enzymatic glucose sensor has high sensitivity (37.31𝜇A𝑐𝑚−2/m𝑀).

 

Nickel oxide (NiO) was used as an auxiliary color-changing layer for an all-solid-state ITO/WO3/Li-NbO3/NiO/ITO device deposited with magnetron sputtering. NiO film was deposited at different oxygen flow rates from 4-10 sccm. When the oxygen flow rate is 4 sccm, the optical modulation at a wavelength of 550 nm is 53.4%.

 

We report a flexible capacitive pressure sensor based on a porous dielectric film of polydimethylsiloxane for wide-range pressure sensing. A 2-propanol aqueous solution is employed as the porogen for the formation of porous microstructures with controlled size. Improved pressure sensing performance and the capability for different stimuli are discussed.

 

To meet the missions of earth observation in the next decade, optical remote sensing systems require totally 8 optical satellites. Among these, more than 24 lightweight spaceborne mirrors will be fabricated on schedule. This paper reports the development in automation for the rapid, cost-effective, and high quality light-weighted processing process.

 

Fused silica was patterned by a continuous CO2 laser with an energy density of 0.24 J/mm2, presenting agglomerated nanoparticles of <100 nm in the groove of around 20 μm deep and 153 μm wide. Chemical analysis indicated the removal of silicon-related impurities in laser processing, inducing more purified silica surface.

 

The results of experimental ITO/TNO double layers, the thickness combination with 70/30 nm has the lowest the average reflectance, which was reduced by 2.3% and the experimental result showed the same trend with the simulated results.

 

Plasma-assisted atomic layer deposition was used in this experiment. The antireflection (AR) film was coated on the plastic substrate to test the adhesion and film crack. The optimized parameters were found for coating on the curved-surface micro lens. The reflectivity and uniformity of each point were measured by optical microscope.

 

We demonstrate the fabrication of a Si based metal insulator semiconductor (MIS) photo-detector of the Al/TiO2/Si structure and its characteristics of photo-responsivity. White light blinded enhancement of photo responsivity around UV can be effectively achieved by simply tuning the TiO2 thickness.

 

The mid-infrared bandpass filter of SiO2(Ge/SiO2)11 multilayer films was fabricated by electron beam evaporation with ion assisted deposition. Residual thermal stress and thermal expansion coefficient of the mid-infrared bandpass filter was measured by an optical interferometer with heating temperature range of 20-100℃.

 

In this work, In-doped ZnO thin films were prepared by ultrasonic spray pyrolysis, then annealed in NH3 at temperature of 500°C for 30 minutes. The highest In-doped ZnO thin films were converted into p-type semiconductors, with the highest hole concentration of 2.4×1019 cm-3 and the lowest resistivity of 0.19 Ω-cm.

 

A high-quality AlN film was grown using DC magnetron sputtering technology with a Al intermediate film deposited pre-sputtering on a Si <111> substrate at 300 °C. We observed that the film crystal orientation was AlN<100> and the surface roughness of the aluminium-containing film was better than that without aluminium.

 

We use three smartphones to study how three features, i.e. blue light filter mode, brightness adjustment, and dark mode, affect viewing safety. Amongst, adjusting brightness is the most effective, which can increase the viewing time by 20 to 48% while adopting blue light filter mode is the least effective.