 We are working on a new semiconductor, it's called Black's Phosphorus or Phosphory. Ultra-thin, ultra-light and also with wavelength tuneability, which can offer us to fabricate lots of interesting devices such as LED and solar cells. We use the similar way that was used to fabricate graphene to fabricate phosphory. We use the scotch tape to thin down the material from the box state to a few layers and finally to a molar layer. We successfully identify the molar layer, bilayer and triple layers up to a few layers and then we precisely determine the optical gap from each layer and then we found that the light emission is very sensitive to the layer number and the wavelength ranges from near infrared to middle infrared. And this type of property was never reported before in other materials.