OMNT November selection
“Imaging chromophores with undetectable fluorescence by stimulated emission microscopy”, Wei Min, Sijia Lu, Shasha Chong, Rahul Roy, Gary R. Holto, X. Sunney Xie, Nature 461, 1105-1109 (2009)
Fluorescence, that is, spontaneous emission, is generally more sensitive than absorption measurement, and is widely used in optical imaging. However, many chromophores, such as haemoglobin and cytochromes, absorb but have undetectable fluorescence because the spontaneous emission is dominated by their fast non-radiative decay. Yet the detection of their absorption is difficult under a microscope. Here we use stimulated emission, which competes effectively with the nonradiative decay, to make the chromophores detectable...
« Optical Antennas », Palash Bharadwaj, Bradley Deutsch, and Lukas Novotny, Advances in Optics and Photonics 1, 438–483 (2009) doi:10.1364/AOP.1.000438
Optical antennas are an emerging concept in physical optics. Similar to radiowave and microwave antennas, their purpose is to convert the energy of free propagating radiation to localized energy, and vice versa...
« Photonic Nanojets », Alexander Heifetz, Soon-Cheol Kong, Alan V. Sahakian, Allen Taflove, and Vadim Backman, Journal of Computational and Theoretical Nanoscience 6, 1979–1992 (2009).
This paper reviews the substantial body of literature emerging since 2004 concerning photonic nanojets. The photonic nanojet is a narrow, high-intensity, non-evanescent light beam that can propagate over a distance longer than the wavelength λ after emerging from the shadow-side surface of an illuminated lossless dielectric microcylinder or microsphere of diameter larger than λ.../http%3A%2F%2Fdrh.univ-amu.fr%2Fsites%2Fall%2Fthemes%2Famu_theme_directions%2Fimages%2Fbandeau.png)
/idata%2F0520783%2F_5027_150.jpg)
/http%3A%2F%2Fwww.fresnel.fr%2Fspip%2Fspip.php%3Faction%3Dacceder_document%26amp%3Barg%3D1150%26amp%3Bcle%3Dfb848ef3e38774474118725519e78dbe%26amp%3Bfile%3Djpg%2Ffresnel_lab.jpg)
/idata%2F0520783%2FGraphique-1-b.jpg)
