Devices for generation of electromagnetic radiation of predetermined profile

A sensing method for determining one or more properties of at least one sample, comprising:

• (a) providing at least one device configured and operable to produce electromagnetic radiation of predetermined properties, said at least one device being configured as a layered structure and comprising:
• a light interacting layer, in communication with at least one light emitting source, comprising one or more light interacting regions, each configured to define a closed-loop light mixing path for optically coupling a pair of input coherent light components of predetermined first and second frequencies to create an output radiation component of a third beating frequency of a predetermined high-frequency profile;
• and a control layer interfacing said light interacting layer, said control layer being configured for controllable switching between an inoperative opaque state and an operative transparent state with respect to the at least one third beating frequency, to therefore selectively prevent and allow transmission of the at least one output radiation component of the third frequency towards a medium in the vicinity of the layered structure;
• and
• (b) coupling at least one sampler comprising (i) at least one transmitter, (ii) at least one receiver and (iii) at least one sampling cell located therebetween, to an output of said device to thereby receive said output electromagnetic radiation, wherein said at least one sampler is configured as an electron emission device, said at least one transmitter being configured as a photocathode configured and operable to receive the output electromagnetic radiation and generate corresponding photo electrons that travel through said at least one sampling cell towards said at least one receiver being configured as an anode, wherein interaction between the photo electrons and the at least one sample in said sampling cell is indicative of said one or more properties of said sample.