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Development of direct laser interference technology (DLIT) is reviewed in this paper. With the merits of being independent on the pretreatment, mask and pattern transfer processes, DLIT is demonstrated a facile and efficient method of producing sub-micro structures on various material surfaces. From a representative perspective, a number of past achievements, containing theoretical and practice aspects,...
This paper presents a method to make magnetic surface patterns by non-destructive laser interference, and periodic magnetic fringes produced on magnetic material surfaces are investigated by magnetic force microscopy (MFM). Various thermal effects are obtained by two beam laser interference with different exposure times and pulse energies. The experimental results have shown that magnetic patterns...
Laser Interference Lithography (LIL) techniques enable quantitative generation of periodic structures such as array of holes, dots and lines, which are the intrinsic structure in some optical functional material. In this paper, the most common errors factors that could affect the result of laser interference lithography were presented. The methods to enhance the quality of patterns of LIL also have...
This paper describes a method of determining two-dimensional phase shifts. In this method, the two-dimensional phase shift is divided into horizontal and vertical components, and each component of the phase shift is determined by pattern correlation, Pythagorean theorem and linear interpolation with subpixel accuracy. The computer simulation and experiment have shown that the method is useful for...
Periodic and quasi-periodic structures on silicon surface have numerous significant applications in photoelectronics and surface engineering. A number of technologies have been developed to fabricate these structures in various research areas. In this work, we take the strategy of direct nanosecond laser interference patterning technology. Well-defined grating and dot structures have been achieved...
This paper introduces a method for the determination of the slope and period of oblique and equi-spaced fringes by pattern correlation. In the method, two pairs of image patches in two different regions of a fringe pattern are selected for pattern correlation calculations, and the phase shift between the two selected regions of the fringe pattern is obtained from the phase curves computed with the...
Laser interference lithography (LIL) is an established fabrication technology for micro and nano scale structuring of periodic and quasi-periodic surface patterns. This paper presents a Five-beam Interference Pattern Model for laser interference lithography. It can be programmed to obtain images of interference results showing interference intensity distributions. The majority of 2-5 beam interference...
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