Nanolasers are devices that emit electromagnetic radiation using light amplification by stimulated emission of radiation in the wavelength range from 180 nm to 1 mm. The electromagnetic spectrum of nanolasers includes energy from gamma rays to electricity. Nanolaser radiation for current military and commercial applications includes ultraviolet, visible, and infrared radiation of the spectrum. The ultraviolet radiation for nanolasers consists of wavelengths from 180 to 400 nm. The visible region consists of radiation with wavelengths between 400 and 700 nm. The ability of a medium to absorb electromagnetic beams depends on several factors, including the electronic structure of atoms and molecules, the wavelength of the beam, the thickness of the absorber layer, and internal factors such as temperature and concentration of the absorber material. The absorption coefficient is denoted by µa and is defined by the probability of absorption of a light photon when traveling in a very small length component of its path and is in units of 1-mm, which indicates the amount of reduction in radiant energy due to absorption of rays per unit length z.