Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\27140618
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Proc+Natl+Acad+Sci+U+S+A
2016 ; 113
(20
): 5558-63
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Imaging through plasmonic nanoparticles
#MMPMID27140618
Tanzid M
; Sobhani A
; DeSantis CJ
; Cui Y
; Hogan NJ
; Samaniego A
; Veeraraghavan A
; Halas NJ
Proc Natl Acad Sci U S A
2016[May]; 113
(20
): 5558-63
PMID27140618
show ga
The optical properties of metallic nanoparticles with plasmon resonances have
been studied extensively, typically by measuring the transmission of light, as a
function of wavelength, through a nanoparticle suspension. One question that has
not yet been addressed, however, is how an image is transmitted through such a
suspension of absorber-scatterers, in other words, how the various spatial
frequencies are attenuated as they pass through the nanoparticle host medium.
Here, we examine how the optical properties of a suspension of plasmonic
nanoparticles affect the transmitted image. We use two distinct ways to assess
transmitted image quality: the structural similarity index (SSIM), a perceptual
distortion metric based on the human visual system, and the modulation transfer
function (MTF), which assesses the resolvable spatial frequencies. We show that
perceived image quality, as well as spatial resolution, are both dependent on the
scattering and absorption cross-sections of the constituent nanoparticles.
Surprisingly, we observe a nonlinear dependence of image quality on optical
density by varying optical path length and nanoparticle concentration. This work
is a first step toward understanding the requirements for visualizing and
resolving objects through media consisting of subwavelength absorber-scatterer
structures, an approach that should also prove useful in the assessment of
metamaterial or metasurface-based optical imaging systems.
free
free
free
