http://www.physorg.com/news103469279.html
A stunning technical achievement, this new device which reshapes light waves has myriad potential uses.
The lens is called a holograhic disk or medium. For more information of this
type of optical refraction and interference there is a ton of university research
on this website.
http://colossalstorage.net/colossal7.htm
Also take a look at 8,9,11.htm webpages.
type of optical refraction and interference there is a ton of university research
on this website.
http://colossalstorage.net/colossal7.htm
Also take a look at 8,9,11.htm webpages.
Dreadful lack of detail in the article, compared to others at Physorg.
But from what I can tell, it looks like subwavelength near-field optics, which means you need subwavelength structures to begin with to get subwavelength resolution. Also polarization is important for these kinds of phenomena.
But from what I can tell, it looks like subwavelength near-field optics, which means you need subwavelength structures to begin with to get subwavelength resolution. Also polarization is important for these kinds of phenomena.
I'll be surprised if it actually works.
It's one thing to focus to a very small point. There is also the range along the optical axis within which sufficient focus is maintained. As entailed from the picture, there is still a tradeoff.
Can the focus range in the optical axis be maintain by improving the composition of the slide?
Does the thickness of the slide affect this?
Does the thickness of the slide affect this?
The tradeoff is quite fundamental, coming from fact that if you use more evanescent waves, the resolution improves, but the focus tolerance worsens.
From a related article:
"...The rub, however, is that the smaller the spot, the faster it fades away from the plate. For instance, the intensity of the spot from a circle spacing of 50 nanometers would halve every 5.5 nanometers away from the plate, so anything that needs lighting would have to be extremely close to it..."
From a related article:
"...The rub, however, is that the smaller the spot, the faster it fades away from the plate. For instance, the intensity of the spot from a circle spacing of 50 nanometers would halve every 5.5 nanometers away from the plate, so anything that needs lighting would have to be extremely close to it..."