Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/62869
Title: Theoretical analysis of a thermally induced superresolution optical disk with different readout optics
Authors: Wu, Y. 
Chong, C.T. 
Keywords: Optical memory
Superresolution
Temperature distribution
Issue Date: 1997
Source: Wu, Y.,Chong, C.T. (1997). Theoretical analysis of a thermally induced superresolution optical disk with different readout optics. Applied Optics 36 (26) : 6668-6677. ScholarBank@NUS Repository.
Abstract: Simulations have been performed to evaluate the effect of a thermal-induced mask on the performance of an optical disk. For simplicity and also so as not to lose generality, we first assume that the thermal-induced mask can be represented by an ellipse with variable shape and a relative position with respect to the center of the readout laser spot. Simulation results reveal that the optical disk exhibits a maximum response when almost half the laser spot is covered by the mask. With a conventional single-beam readout technique, however, this can hardly be achieved. The possibility of achieving this by use of an assistant beam with a modified beam profile is discussed. We show that this method allows us to obtain a maximum response in the track direction without any degradation in the radial direction. © 1997 Optical Society of America.
Source Title: Applied Optics
URI: http://scholarbank.nus.edu.sg/handle/10635/62869
ISSN: 00036935
Appears in Collections:Staff Publications

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