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Conventional optical microscopes are restricted by a predetermined limit beyond which it is impossible to resolve distinct points in the objective field. The origin of this limited resolution is associated to the optical diffraction and the loss of evanescent waves in the far field. As a result, objects below this diffraction limit, such as subcellular structures in biology and nanochips in semiconductors,...
A spider uses up to seven different types of silk, all having specific functions, to build its web. For scientists, native silk — directly extracted from spiders — is a tough, biodegradable and biocompatible thread used mainly for tissue engineering and textile applications. Blessed with outstanding optical properties, this protein strand can also be used as an optical fibre and is, moreover, intrinsically...
Optical characterisation of a Nephila edulis spider dragline silk is performed. The silk fiber transmits light up to 1400 nm with a propagation loss of ∼9 dB/cm and birefringence of 8×10−3 measured at 1302 nm.
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