A5056041609- Acoustic Wave Resonator Technologies
- Photonic and Optical Devices
- Mechanical and Optical Resonators
- GaN-based semiconductor devices and materials
- Ultrasonics and Acoustic Wave Propagation
- Terahertz technology and applications
- Advanced Fiber Laser Technologies
- Advanced MEMS and NEMS Technologies
- Perovskite Materials and Applications
- Photoacoustic and Ultrasonic Imaging
- Acoustic Wave Phenomena Research
- Near-Field Optical Microscopy
- Photonic Crystals and Applications
- Quantum Dots Synthesis And Properties
- Plasmonic and Surface Plasmon Research
- Chalcogenide Semiconductor Thin Films
- Force Microscopy Techniques and Applications
- 2D Materials and Applications
- Iron-based superconductors research
- Spectroscopy Techniques in Biomedical and Chemical Research
- Semiconductor Quantum Structures and Devices
- ZnO doping and properties
- Thermography and Photoacoustic Techniques
- Nonlinear Optical Materials Studies
- Thermal properties of materials
Guangdong Pharmaceutical University
2025
Academia Sinica
2007-2024
Institute of Physics, Academia Sinica
2014-2024
University of Electronic Science and Technology of China
2024
National Taiwan University
2002-2018
Ming Chi University of Technology
2018
National Taiwan Normal University
2014-2018
Tamkang University
2018
National Tsing Hua University
2002-2017
Institute of Materials Research and Engineering
2015
Photocatalytic water splitting is a key technology for long-term hydrogen evolution with low environmental impact.
A long-standing pursuit in materials science is to identify suitable magnetic semiconductors for integrated information storage, processing, and transfer. Van der Waals magnets have brought forth new material candidates this purpose. Recently, sharp exciton resonances antiferromagnet NiPS3 been reported correlate with order, that is, the photoluminescence intensity diminishes above Néel temperature. Here, it found polarization of maximal emission rotates locally, revealing three possible...
Silicon photonics have attracted significant interest because of their potential in integrated components and all-dielectric meta-optics elements. One major challenge is to achieve active control via strong photon-photon interactions, i.e. optical nonlinearity, which intrinsically weak silicon. To boost the nonlinear response, practical applications rely on resonant structures such as microring resonators or photonic crystals. Nevertheless, typical footprints are larger than 10 μm. Here, we...
Production of multicolor or multiple wavelength lasers over the full visible-color spectrum from a single chip device has widespread applications, such as superbright solid-state lighting, color laser displays, light-based version Wi-Fi (Li-Fi), and bioimaging, etc. However, designing lasing devices remains challenging issue owing to material requirements for producing emissions sophisticated design action. Here we demonstrate simple highly efficient segment white random based on...
We demonstrate molecule-specific third-harmonic-generation (THG) microscopy by using silver nanoparticles as THG contrast agents. Through matching surface plasmon wavelength to wavelength, strong can be provided under microscopy. By conjugating anti-her2 antibodies with nanoparticles, the expression of Her2/neu oncogene in cancer cell membranes is successfully imaged modality for first time.
One of the key issues affecting performance solar cells is behavior carrier transfer. In this work, time-resolved photoluminescence (TRPL) technique was utilized to investigate electron transfer at CdS/CdSe, TiO2/CdS, and TiO2/CdSe heterointerfaces. By varying excitation wavelengths, lifetimes CdSe CdS in TiO2/CdSe, TiO2/CdS/CdSe, TiO2/CdSe/CdS photoelectrodes were measured. The results show that, for single sensitizer electrodes (TiO2/CdS, TiO2/CdSe), average PL lifetime (0.69 ns) shorter...
Abstract Because of their exceptional local-field enhancement and ultrasmall mode volume, plasmonic components can integrate photonics electronics at nanoscale active control plasmons is the key. However, all-optical modulation response with nanometer volume unity depth still lacking. Here we show that scattering from a nanoparticle, whose smaller than 0.001 μm 3 , be optically switched off less 100 μW power. Over 80% observed shows no degradation after repetitive switching. The spectral...
Upconversion nanoparticles on graphene based broadband photodetector showing unprecedented values of device parameters is demonstrated with response even for hand held domestic appliances.
Objective: To explore the latent-classes of HIV high risk behaviors among college students, and association between experiences intimate partner violence (IPV) behaviors, to provide evidence for reducing them. Methods: A cross-sectional study was conducted from October December 2019 university students six higher education institutions in Zhuhai City, using a multi-stage cluster sampling method, with an estimated sample size 1 318. The included participants who self-reported being romantic...
Abstract Flexible spintronics is a crucial emerging field in next‐generation wearable and innovative electronic technology. Traditionally, relies on external magnetic fields ferromagnetic contacts to achieve spin‐polarized carriers. This makes it challenging realize flexible spin devices due the inherently bulky rigid constituent materials. To overcome these drawbacks, strategy proposed for fabricating light‐emitting diodes by integrating self‐assembled monolayer (SAM) of P3HT‐COOH, chiral...
We apply phase contrast imaging to enable, sharply focused visualization of terahertz waves in electro-optic media.The approach allows quantitative characterization THz the 60 GHz -4.5 frequency range a thin dielectric slab and in-focus observation polaritonic structures.
We report a direct determination of the specular scattering probability acoustic phonons at crystal boundary by observing escape incident coherent from state during reflection. In sub-THz frequency range where phonon wavelength is much longer than lattice constant, phonon-interface interaction found to agree well with macroscopic theory on wave rough surfaces. This examination thus quantitatively verifies dominant role atomic-scale corrugations in Kapitza anomaly observed 1-10 K and further...
Free exciton and above-band-gap free carrier dynamics in ZnO nanorods have been investigated at room temperature with a femtosecond transient transmission measurement. Following the photoexcitation of carriers, an extremely fast external thermalization time on order 200 fs can be observed. Under high excitation, hot phonon effects were found to delay cooling process. While energy was tuned match transition, stable formation uncovered while no evident ionization process unless photoexcited...
We demonstrate generation of frequency-tunable, multicycle terahertz phonon-polariton waves in a LiNbO3 slab waveguide. Because the waveguide modes show considerable phase-velocity dispersion, we are able to enhance frequency-selected narrowband by using femtosecond optical pulses whose intensity fronts tilted at angles that meet appropriate noncollinear phase-matching conditions. The pump light is spread across large area crystalline within which coherent wave occurs, averting material...
We have experimentally investigated the optical second harmonic generation (SHG) on suspended single-layer and bi-layer graphene sheets. By shining normally incident 800-nm light with polarization along sample planes, SHG intensities of are found to be comparable one polar GaAs large order susceptibility, which is unexpected because both centrosymmetric property. Our experimental results reveal that strong not due defects breaking symmetry. Instead, we suggest signals result from long-range...
Abstract Spin optoelectronics is an indispensable key for the future development of spintronics. In conventional spin light emitting diodes (LEDs), spin‐polarized carrier pairs are injected electrically into layer and create circularly polarized (CPL). Generally, carriers accomplished using ferromagnetic contacts or applying external magnetic field, which will produce several drawbacks, including low temperature operation, injection efficiency, etc. To circumvent existing shortcomings, here,...
Abstract High‐index nanostructures are found to exhibit large nonlinearity of spectral responses under photoexcitation, which is applicable all‐optical modulation. The stems from Mie‐type resonance shift due photoinduced variation refractive index. Here, amorphous silicon‐based Huygens’ metasurface absorber and ultrafast excitation used demonstrate two orders magnitude enhancement modulation depth, both theoretically experimentally, when electric dipole lattice matches the magnetic...
Multifunctional lanthanide-doped upconversion nanoparticles (UCNPs) have spread their wings in the fields of flexible optoelectronics and biomedical applications. One ongoing challenges lies achieving UCNP-based nanocomposites, which enable a continuous-wave (CW) laser action at ultralow thresholds. Here, gold sandwich UCNP nanocomposites [gold (Au1)–UCNP–gold (Au2)] capable exhibiting lasing thresholds under CW excitation are demonstrated. The metastable energy-level characteristics...