Researchers at Alberta University in Canada succeeded in generating green light through the third harmonic with insulated silicon nano-plasma waveguides. The third harmonic generation device is excited by a 1550 nm laser and is processed by a gold layer waveguide with a height of 340 nm, a width of 95 nm and a thickness of 60 nm which is processed on an insulating silicon substrate to finally output a green light of 517 nm at the output end.
It is known that silicon is the material with the highest third-order nonlinearity and the highest refractive index of all CMOS materials. It is usually difficult to emit light in the visible wavelength band because the silicon band gap is not straight and any visible light generated is strongly absorbed. To overcome these obstacles, the waveguide utilizes its internal surface-to-plasma mode light-matter coupling and a strong local infrared electric field to achieve effective nonlinear light mixing and short distances [than green light at about 700 nm for silicon Absorption of short length] within the third harmonic occurs. Waveguides are capable of producing broadband visible light by energetically accelerating the light in a steep gradient field at the silicon-copper interface to excite electrons and driving the electronic avalanche multiplier and impact ionization processes in a strong nanosphere.
Ultra Low Temperature Infrared Pyrometer
This classification includes one color infrared pyrometers measuring range is 0℃-1000℃. The one color pyrometers currently on market are mostly narrow-band pyrometers. Its principle of temperature measurement is to determine the temperature by detecting the radiant energy that occurs in a narrow wavelength range (8-14μm for 0-1000C pyrometer) of an object. The temperature a pyrometer measured is the average temperature in an area, and the measuring result is affected by emissivity, lens contamination and background radiation.
To use 1-color pyrometer mode, the measured area of the object should be large (it can fully fill the target field of view) , object surface should be relatively flat (not curved), measurement direction should less than 30 degrees, and the physical and chemical state of the measured object surface should be stable (not in the process of oxidation, gasification or liquefaction) , the optical channel should with less dust and without blocking and attenuation.
Main applications include: inductioin heating,heat treatment,Galvanized wire ,also suitable for temperature measurement in a good environment. Products in this catalog are usually applied to metallurgical industry(rod and wire mills.Hot rolling mills), foundry, cement kiln, induction heating, heat treatment, heating furnace, vacuum furnace, monocrystalline silicon, polysilicon, semiconductor and other industrial temperature measurement.1000C infrared pyrometer, compact infrared pyrometer, small online infrared pyrometer
Changzhou Sijie Optoelectronics Technology Co.,Ltd. , https://www.sjinfrared.com