How to produce LED chips by using photonic crystals LED

Photonic crystals have three chemical features, can be used in various areas through manual controls. 1) Block the light through optical energy gaps. Usually, technicians utilized this characteristic to lock light in a fairly narrow region, like integrated circuit. 2) The photonic crystal anisotropy of photonic crystals. Light emitted from photonic crystals will be scattered in different directions. Because the translucency of photonic crystals is variable with the polarization of the light. Thus the light transmitting and the light blocking occurred alternatively. 3) The curve of photonic crystals is complicated changeful. Because of the fast and irregular changes of photonic crystals curves, slightly changes in we light wavelength will cause huge angle shift of the input light. The biggest advantage of photonic crystals is that their size are much smaller than 1/1000 of integrated circuits. In another words, the integration will be 1000 times higher than before. Besides, the refraction coefficient will be 1000 times larger than more, as well.

 

Photonic crystals have three chemical features, can be used in various areas through manual controls.

 

Photonic crystals have other features. In fully use of these features can create photonic crystal LED. These LED lights can be divided into two major parts: (Light Emitting Diode) LED and Laser Diode (LD). LD can continued to be divided into Photonic crystal DFB LD and Photonic crystal defect LD. The DFB value of Photonic crystal DFB LD can be maintained in a rather low level to complete the lunch, with which we are very familiar. This structure must have optical energy gaps. It is very hard to achieve commercialization under such circumstance.

 

However, creating photonic crystals LED is much simpler. Some people may confuse this process with Photonic crystal DFB LD and consider of using specific frequency or wavelength and create photonic crystals LED. The answer is no. The incident and diffracted light of Photonic crystal DFB LD and Photonic crystal LD is limited. It is impossible to make use of certain frequencies or wavelength to enhance efficiency. This property is rather important for LED.

 

During the creating process of photonic crystals LED, scientists found that the application of transparent electrodes has litter effects on the final lighting efficiency. According to this result, scientists usually covered a tiny layer of transparent electrodes on photonic crystals. Use sapphire as substrates. And then create photonic crystals LED through MOCVD, EB and RIE ETCHING process.