Negative polarisation in fluorescence

Krishnan, K. S. ; Mitra, S. M. (1933) Negative polarisation in fluorescence Nature, 131 (3302). pp. 204-205. ISSN 0028-0836

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In an important paper Wawilow has reported measurements on the polarisation of fluorescence of solutions of some dye-stuffs in glycerine, when excited by radiations of different wave-lengths. Using for excitation the radiations from a mercury lamp, isolated by a quartz monochromator, he finds that the degree of polarisation shows a marked dependence on the wave-length of the exciting light. Starting from the visible region of the spectrum, as the wavelength of the exciting light is diminished the degree of polarisation decreases rapidly, passes through a minimum value (corresponding, in genera], to excitation by λ3125-3131), and rises again as we proceed farther towards the ultra-violet. The minimum value is usually negative; that is, the intensity of the fluorescent vibrations along the direction of propagation of the incident light is greater than that of vibrations in the perpendicular direction.

Item Type:Article
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ID Code:28455
Deposited On:15 Dec 2010 12:01
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