Sensitive component for device for measuring electromagnetic field by thermofluorescence, corresponding measurement and manufacturing methods

A method of manufacturing a component sensitive to an electromagnetic field, comprising the following acts:

• forming a first absorbent material, able to absorb energy of the electromagnetic field and convert the energy absorbed into heat;
• and
• forming a second fluorescent and thermosensitive material, placed in contact with said first material in order to store the heat converted by said first material, said second material being able to re-emit, under action of a predetermined excitation light, a light by fluorescence with light intensity dependent on the stored heat, said second material comprising a plurality of fluorescent compounds, each able to re-emit the light by fluorescence with a different wavelength.