Scintillator structure and a method for emitting an output signal at a specific wavelength range

A method for emitting an output optical signal at a specific wavelength range comprising:

• selecting at least two layered materials having a different refractive index and at least two different material compositions;
• wherein none of each layered material has all scintillation properties by itself,
• determining at least one angle of emission to thereby control the directionality of the optical signal emission and to fit detectable directions, wherein the at least one angle of emission is below a critical angle defined by an interface between at least one of the two layered materials and the air;
• calculating an emission rate enhancement;
• calculating an optimal pattern including simulation parameters considering the at least one angle of emission, a number of emitted photons and an emission rate enhancement in a particular frequency range;
• wherein the simulation parameters comprise the refractive indices of the at least two layered materials, the width of the at least two layered materials for the calculated emission rate enhancement to maximize the efficiency and the emission rate of the detectable photons;
• varying the width of each layered material to modify the photonic band structure and thus control the photonic local density of states (LDOS) for each frequency and propagation angle and the polarization;
• wherein each layer of the plurality of layers has a different width;
• selecting geometrical parameters of each layered material to control an emission rate of an output optical signal and a directionality of an optical signal emission;
• wherein at least one of each different material composition or the geometrical parameters of each layered material are selected according to the specific wavelength range of the emitted output optical signal;
• optimizing the geometrical parameters of each layered material to fit an emitter spectral distribution;
• exposing the at least two layered materials to an input radiation;
• and
• emitting an output optical signal at a specific wavelength range.