Contract activities on ISS Russian Segment
	 Experiment JAXA 3DPC-2
	 
	  To effectively control coherent light radiation fluxes, it was proposed to use   regular spatial structures with periodic variations in refraction factor in three 
				  directions - photonic crystals. Such systems are formed by particles 100-300 nm in 	  diameter in electrolytic solutions and fixed in gel matrix through photocuring.   Under normal gravity the periodicity of the photonic crystal structure is distorted   by the process of particle sedimentation in the electrolyte. Under microgravity, 	  obtaining large high-quality photonic crystals becomes possible.
	 
		   Objective:
		     To obtain 3D photonic crystals by the method of self-organization and   ordering of colloidal nanoparticles in electrolyte solutions with subsequent 						fixation in an elastic gel matrix.
		          				  
		  Tasks:
		  To grow colloid crystals in zero gravity, to fix the crystal structure 	  by photocuring, to deliver the obtained materials to Earth.
		
		               
					 Science Hardware Used:
  
					 3DPCGF hardware consisting of:
                          
                            - 3DPCU main unit;
- Switch box and power unit for 3DPCU;
- Cable set.
Expected Results:
                         The unique optical properties of photonic crystals make them a promising   product for use in highly efficient optical communications and data 
						  processing applications. The use of photonic crystals will allow   significantly improving noise immunity and data processing rates.
                                          
	   Experiment Results:
	  Returned to Earth is the 3DPCU main unit with samples of the obtained 	  photonic crystals.