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In order to obtain higher light output power, the flip-chip structure is used. We studied the ratio of the light of GaN sides before and after fabricating metal reflector on p-GaN. The SiO2/SiN x dielectric film reflectors were deposited through plasma enhance chemical vapor deposition following the fabrication of metal reflector, and then the dielectric(More)
The theory of lensless formation of multiple images from a single object by Fresnel-Dirac sampling is reexamined. It is concluded that the multiple-image formation does not really occur in principle. However, reasonably good image arrays can be obtained if the sampling filter is properly designed. These image arrays appear when the reduced length Q(More)
In this paper we suggest that a one-dimensional grating may be employed in place of the random diffuse screen and slit used in one-step, two-dimensional rainbow holography. A demonstration of this slitless rainbow holography is given by means of Fourier optics. Holograms fabricated in this manner in a 4f-like processing system prove to be satisfactory. This(More)
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