April 2022
Spotlight Summary by Yiyu Ou
Modeling of ultraviolet propagation from air to human epidermis with wavelength range of 200–300 nm
Ultraviolet (UV) irradiation has great potential for being an effective therapy method for human infectious diseases. In general, UV irradiation especially in the UVC (100-280nm) range is considered as a health hazard due to its DNA damage effect caused by the UV absorption by this molecule in this spectral range. For this reason, traditional broadband UVC light sources such as Mercury lamps are mainly used for disinfection and sterilization of inanimate objects. However, in the specific far-UVC (200-230nm) range, light strongly interacts with proteins and is thus prone to being completely absorbed by the stratum corneum layer (dead cell layer, 10-30µm thick) of human skin before it reaches deeper epidermis layers. Therefore, monochromatic far-UVC light sources (excimer lamps, LEDs) are focusing research attention for being an effective and safe therapy method of dermatologic infections. To numerically support technology developments in the field, T. Wu and coauthors present in this article a theoretical model, based on the Monte Carlo method, which can estimate the UV radiation intensity on human skin as well as the photon penetration depth in the epidermis. The reported simulations are in good accordance with experimental results. This research provides a simple safety guideline for the UV treatment of dermatologic diseases.
You must log in to add comments.
Add Comment
You must log in to add comments.
Article Information
Modeling of ultraviolet propagation from air to human epidermis with wavelength range of 200–300 nm
Tianfeng Wu, Fang Yang, Tian Cao, and Jian Song
Opt. Lett. 47(7) 1662-1665 (2022) View: Abstract | HTML | PDF