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Integrated chip-scale electrodes allow isolated control of resonances and phases in optical multi-cavity system. By varying the round trip length, destructive and constructive intra-cavity interferences are observed, representing all-optical analogue to electromagnetically-induced-transparency and superradiance on-chip.
Deoxyribonucleic acid (DNA) biopolymer was used as optical waveguide core material, and reactive ion-beam etching process was used to form channel waveguides. The etching conditions were optimized and the waveguides were characterized optically.
Heat assisted magnetic recording (HAMR) was initially proposed in the 1990's to achieve storage densities not limited by superparamagnetism. The key to HAMR has been to find an efficient near field transducer that can operate with a nearby magnetic recording pole. An integrated HAMR head has now been demonstrated which can record at a track width of 50 nm and an areal density of ~240 Gb/in2 on high...
The necessity of an optimisation procedure in optical phased array (OPA) design has been demonstrated. Simulated annealing was used to perform the numerical simulation. The analysis studies the scheme of a two-dimensional fibre-type OPA with piezoelectric ceramics (PZT) phase shifters. Moreover, an experimental system has been set up to confirm the integrity of the design.
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