Successful trials have been made through a designed algorithm to quantize, compress and optically encode unsigned 8 bit integer values in the form of images using nano optical features. The periodicity of the nano scale features (nano gratings) have been designed and investigated both theoretically and experimentally to create distinct states of variation (three on state and one off state). The benefits of using a 4 state unit information carrier is been investigated through transmission models of non ergodic and ergodic signals. A thorough investigation has targeted the effects of the use of multi-varied state nano optical features on data storage density and consequent data transmission rates.
In this work the dependency of the transmitted spectrum through arrays of nano-holes on the angle of
incident light was investigated. The arrays of nano-holes fabricated on thin aluminum (Al) layer which was
deposited on a quartz substrate were used to observe how change of the angle of incident light could change
the peak of transmitted spectrum. Through far-field spectroscopy it was shown that the transmitted spectrum
is detectable at the distances beyond 20 cm.
In this work, the diffractive capability of nano-scale gratings fabricated on transparent substrates is
investigated. Nano-hole arrays of 9 to 20 mm2 with 450 nm, 550 nm and 650 nm periodicities were milled on 5
nm-thick chromium coated sheet of polyethylene terephthalate (PET) substrates using a focused ion beam
(FIB) to create periodicity-dependent diffraction patterns. Based on the method with which the diffraction
pattern was measured a new technology is proposed in which the optical signals are used to encode