| 1. |
|
|
| 2. |
- Gong, Hanmo, et al.
(författare)
-
Gold nanoparticle transfer through photothermal effects in a metamaterial absorber by nanosecond laser
- 2014
-
Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 4, s. 6080-
-
Tidskriftsartikel (refereegranskat)abstract
- A non-complicated, controllable method of metallic nanoparticle fabrication at low operating light power is proposed. The method is based on laser-induced forward transfer, using a metamaterial absorber as the donor to significantly enhance the photothermal effect and reduce the operating light fluence to 35 mJ/cm(2), which is much lower than that in previous works. A large number of metallic nanoparticles can be transferred by one shot of focused nanosecond laser pulses. Transferred nanoparticles exhibit good size uniformity and the sizes are controllable. The optical properties of transferred particles are characterized by dark-field spectroscopy and the experimental results agree with the simulation results.
|
|
| 3. |
- Jiang, Nan, et al.
(författare)
-
Stochastic Backpropagation for Coherent Optical Communications
- 2011
-
Ingår i: European Conference and Exposition on Optical Communications, ECOC. - Washington, D.C. : OSA. - 2162-2701. - 9781557529312 - 9781557529312
-
Konferensbidrag (refereegranskat)abstract
- We present stochastic backpropagation, a novel maximum a posteriori detection method for coherent optical communication. The proposed detector is shown to outperform conventional backpropagation in a scenario where nonlinear phase noise is the dominant impairment.
|
|
| 4. |
- Gong, H., et al.
(författare)
-
Photothermal Switching Based on Silicon Mach-Zehnder Interferometer Integrated with Light Absorber
- 2016
-
Ingår i: IEEE Photonics Journal. - : Institute of Electrical and Electronics Engineers (IEEE). - 1943-0655. ; 8:2
-
Tidskriftsartikel (refereegranskat)abstract
- We present an all-optical switch based on photothermal effects in a silicon Mach-Zehnder interferometer (MZI) integrated with a light absorber. The metal-insulator-metal light absorber located near the longer arm of the asymmetric MZI efficiently converts infrared light to heat. Pumped by a continuous-wave 1064-nm laser, the spectral transmittance of the fully etched strip waveguide (half-etched rib waveguide) MZI can be tuned with an efficiency of 38 pm/mW (98.5 pm/mW). Dynamic switching experiments show that the rise/fall time constant of the output probe light is 11.45/10.98 μs (8.25/7.13 μs) for the fully etched (half-etched) MZI.
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
- Wang, Shu Min, 1963, et al.
(författare)
-
A novel semiconductor compatible path for nano-graphene synthesis using CBr4 precursor and Ga catalyst
- 2014
-
Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322 .- 2045-2322. ; 4
-
Tidskriftsartikel (refereegranskat)abstract
- We propose a novel semiconductor compatible path for nano-graphene synthesis using precursors containing C-Br bonding and liquid catalyst. The unique combination of CBr4 as precursor and Ga as catalyst leads to efficient C precipitation at a synthesis temperature of 200 degrees C or lower. The non-wetting nature of liquid Ga on tested substrates limits nano-scale graphene to form on Ga droplets and substrate surfaces at low synthesis temperatures of T = 400 degrees C. Good quality interface nano-graphene is demonstrated and the quality can be further improved by optimization of synthesis conditions and proper selection of substrate type and orientation. The proposed method provides a scalable and transfer-free route to synthesize graphene/semiconductor heterostructures, graphene quantum dots as well as patterned graphene nano-structures at a medium temperature range of 400-700 degrees C suitable for most important elementary and compound semiconductors.
|
|
| 8. |
- Yan, Chunsheng, et al.
(författare)
-
Techniques related to graphene biosensors and their potential combination with optical fibres
- 2011
-
Ingår i: Materials technology (New York, N.Y.). - 1066-7857 .- 1753-5557. ; 26:4, s. 173-183
-
Tidskriftsartikel (refereegranskat)abstract
- From zero-dimensional fullerene to one-dimensional carbon nanotube and to two-dimensional graphene, nanostructures based on carbon element are always one of the most exciting topics in modern science and technology. The work published in the open literature dealing with the properties, synthesis and sensor applications of graphene is overviewed. The potential techniques to realise optical fibre graphene sensors are presented and discussed.
|
|
| 9. |
- Yan, J.Y, et al.
(författare)
-
MBE synthesis of graphene using CBr4
- 2013
-
Ingår i: The 17th European Workshop on Molecular Beam Epitaxy, Levi, Finland, 2013.
-
Konferensbidrag (refereegranskat)
|
|
| 10. |
- Yang, M., et al.
(författare)
-
Analysis of eddy viscosity models in predicting flow field of high-speed water jet
- 2014
-
Ingår i: Nongye Jixie Xuebao. - 1000-1298. ; 45:7, s. 306-312
-
Tidskriftsartikel (refereegranskat)abstract
- Three commonly used two-equation turbulence models were adopted. The computed velocity field was compared with the data from corresponding laser Doppler anemometer measurement to analyze the accuracy of these models. By adjusting the model parameters, the simulation data can fit into the experimental result. The optimal viscosity coefficients Cμ in these used eddy viscosity models were presented. It is shown that the RNG k-ε model is more sensitive to Cμ, while the results from Standard k-ε model vary almost linearly with the change of the Cμ value. Study on the simulated flow field gives that if the peak of turbulence kinetic energy appears within the radial span, it will affect the velocity distribution along the jet axis; otherwise, it will modify the velocity magnitude. The proposed numerical scheme reduces the physical complexities involved in ultra-high pressure injection process so that it can be applied to archive fast production from relevant CAE workflow.
|
|
