Metalens may simplify generation and control of vacuum UV light

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Description

It is entering the time of year during which I must remember sunscreen or risk turning into a bright red (and painful) tomato whenever I go outside. Yet while ultraviolet light is often identified as the culprit behind sunburns, not all UV light is equally culpable.

Just as visible light can be divided into different colors based on its wavelength, the UV radiation spectrum is divided into four regions: UVA, UVB, UVC, and vacuum UV. UVA and UVB are the main culprits behind sunburns. UVA consists of the longest wavelengths (320–400 nm) and is associated with skin aging. UVB consists of slightly shorter wavelengths (280–320 nm) and is associated with skin burning.

UVC (200–280 nm) and vacuum UV (<200 nm) have more energy than UVA and UVB, which technically makes them more hazardous. However, these wavelengths are readily absorbed by many gases in the atmosphere and so rarely make it past the ozone layer to reach the Earth’s surface.

Period17 May 2022

Media coverage

TitleMetalens may simplify generation and control of vacuum UV light
Persons
Media name/outletThe American Ceramic Society
PlaceUnited States
Degree of recognitionInternational
Media typeWeb
Producer/AuthorLISA MCDONALD
Date17/05/22
Linkhttps://ceramics.org/ceramic-tech-today/nanomaterials-2/metalens-may-simplify-generation-and-control-of-vacuum-uv-light