Visualization 1.mp4

tuning proces

2: One-way surface magnetoplasmon cavity and its application for nonreciprocal devices

Originally published in Optics Letters on 15 February 2016 (ol-41-4-800

1: One-way surface magnetoplasmon cavity and its application for nonreciprocal devices

Originally published in Optics Letters on 15 February 2016 (ol-41-4-800

Media 2: An efficient plate heater with uniform surface temperature engineered with effective thermal materials

Originally published in Optics Express on 14 July 2014 (oe-22-14-17006

Media 1: An efficient plate heater with uniform surface temperature engineered with effective thermal materials

Originally published in Optics Express on 14 July 2014 (oe-22-14-17006

High-Performance Self-Powered Transparent Metal–Semiconductor-Metal Ultraviolet Photodetector Based on Sub-10 nm Thick Dual-Asymmetric Interdigitated Electrodes

Transparent self-powered ultraviolet (UV) photodetectors (PDs) are demonstrated experimentally with dual-asymmetric interdigitated electrodes composed of Au and Ag with different sizes on top of a ZnO active layer. The electrodes are sub-10 nm thick and highly transparent in both UV and visible regimes, making the whole device look transparent and output light current over 1/3 higher than that of the counterpart with thick opaque electrodes at 0 V. The PD with only electrode material asymmetry can work at 0 V because of the Schottky junction formed at the Au/ZnO interface and the Ohmic contact at the Ag/ZnO interface. The junction asymmetry can be further enhanced by the electrode size difference. The PD with a Au and Ag finger width ratio of 1:4 achieves a photocurrent over 11 times that of the device with identical Au and Ag sizes. A high responsivity of 56.3 μA/W and a high detectivity of 1.54 × 108 Jones are achieved. The rise and fall times are as low as 3.1 and 2.8 ms, respectively. By patterning the pads, our PD becomes more uniform and transparent with an average visible transmissivity improved to 77.6% (the highest among the UV PD chips reported), while the optoelectronic conversion performance remains unchanged. The overall properties are comparable and even superior to those of the previously reported counterparts. This work provides insights into the design and mechanism of transparent self-powered UV PDs, facilitating advancements in this field

Local and Nonlocal Optically Induced Transparency Effects in Graphene–Silicon Hybrid Nanophotonic Integrated Circuits

Graphene is well-known as a two-dimensional sheet of carbon atoms arrayed in a honeycomb structure. It has some unique and fascinating properties, which are useful for realizing many optoelectronic devices and applications, including transistors, photodetectors, solar cells, and modulators. To enhance light–graphene interactions and take advantage of its properties, a promising approach is to combine a graphene sheet with optical waveguides, such as silicon nanophotonic wires considered in this paper. Here we report <i>local</i> and <i>nonlocal</i> optically induced transparency (OIT) effects in graphene–silicon hybrid nanophotonic integrated circuits. A low-power, continuous-wave laser is used as the pump light, and the power required for producing the OIT effect is as low as ∼0.1 mW. The corresponding power density is several orders lower than that needed for the previously reported saturated absorption effect in graphene, which implies a mechanism involving light absorption by the silicon and photocarrier transport through the silicon–graphene junction. The present OIT effect enables low power, all-optical, broadband control and sensing, modulation and switching <i>locally</i> and <i>nonlocally</i>

ROS and p53 involve in cytochrome <i>c</i>-mediated caspase-3 activation during 1800MHz microwave-induced cell apoptosis.

<p>(A, B) Effects of NAC, PIF-α, Ac-DEVD-CHO and Z-VAD-FMK on cell viability and caspase-3 activity after 1800MHz microwave radiation for 24 hours in NIH/3T3 and U-87 MG cells. Cells were pretreated with treatments (NAC, PIF-α, Ac-DEVD-CHO and Z-VAD-FMK) for 20 min and then exposed to 1800MHz microwave or sham treatment for 24 hours. After microwave radiation, cells were harvested and levels of cell viability and caspase-3 activity were measured in NIH/3T3 and U-87 MG cells. Cell Counting Kit-8 (CCK-8, Dojindo Laboratories, Kumamoto, Japan) was used to evaluate cell viability after various treatments. Caspase-3 activity was measured by the caspase-3 activity kit. (C, D) Western blotting analysis of caspase-3 activation and cytochrome <i>c</i> release from mitochondria to cytoplasm. Cells were pretreated with or without NAC and PIF-α for 20 min before exposure to 1800MHz microwave. After microwave radiation for 24 hours, cells were harvested and measured protein levels of caspase-3. The cytoplasm proteins were extracted using a mitochondria/cytoplasm fractionation kit followed by western blotting analysis of cytochrome <i>c</i> in cytoplasm. MW, microwave; NAC, N-acetyl-L-cysteine. PIF-α, pifithrin-α. All the data in these figures are presented as mean ± S.D. (n = 3; *P < 0.05 vs. control group; #P < 0.05 indicated group.)</p

Intensity test of microwave radiation for various electronic devices (peak reading XYZ mode).

<p>Intensity test of microwave radiation for various electronic devices (peak reading XYZ mode).</p