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. Author manuscript; available in PMC: 2019 Jun 11.
Published in final edited form as: Nanophotonics. 2018 Dec 14;8(1):99–116. doi: 10.1515/nanoph-2018-0134

Figure 1. Electromagnetic radiation spectrum from gamma rays to radio waves.

Figure 1

The fluorescence wavelength includes UV (200–400 nm), visible radiation (400–650 nm), and NIR (650–900 nm). The NIR window is considered as the therapeutic window due to the low tissue absorption, low tissue scattering, and low autofluorescence. Reproduced with permission from [2].