Frequency domain optical storage

Moerner WE (1995) Molecular electronics for frequency domain optical storage persistent spectral hole-burning - a review. Journal of Molecular Electronics 1 55-71. 

Not only can the technique of persistent photochemical spectral hole-burning (PSHB) be useful for molecular information processing but it has also been discussed for some time in the context of extremely dense frequency-domain optical data storage [59, 60]. 

Should photochemical hole burning ever be considered seriously for optical information storage, then LB films would be strong contenders in which to store information in the frequency domain. However, until the requirement to operate at liquid helium temperatures is lifted,there seems little chance of commercializing this technology. 

The classical viscoelastic properties are the dynamic shear moduli, written in the frequency domain as the storage modulus G ( y) and the loss modulus G a>), the shear stress relaxation function G t), and the shear-dependent viscosity j (k). Optical flow birefringence and analogous methods determine related solution properties. Nonlinear viscoelastic phenomena are treated briefly in Chapter 14. 

---