Design and Fabrication of Diffractive Light-Collecting Microoptical Device with 1D and 2D Lamellar Grating Structures
Author
Source
International Journal of Manufacturing Engineering
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-06-05
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
This paper presents the optimal design method of diffractive light-collecting microoptical device and its fabrication method by E-beam lithography, fast atom beam etching, and hot-embossing processes.
The light-collecting device proposed in the paper is comprised of 9 (3 × 3) blocks of optical elements: 4 blocks of 1D lamellar grating structures, 4 blocks of 2D lamellar grating structures, and a single block of nonpatterned element at the center, which acts for lens to be able to collect the diffracted and transmitted lights from the lamellar grating structures into the focus area.
The overall size of the light-collecting device is 300 × 300 μm2, and the size of each block was practically designed as 100 × 100 μm2.
The performance of 1D and 2D lamellar grating structures was characterized in terms of diffraction efficiency and diffraction angle using a rigorous coupled-wave analysis (RCWA) method, and those geometric parameters, depth, pitch, and orientation, were optimized to achieve a high light-collecting efficiency.
The master molds for the optimized structures were fabricated on Si substrate by E-beam lithography and fast atom beam etching processes.
The 100 μm thick patterned polymethyl methacrylate (PMMA) film was then replicated by a hot-embossing process.
As a result, the patterned PMMA film collected 63.0% more incident light than a nonpatterned one.
American Psychological Association (APA)
Lee, ChaBum. 2014. Design and Fabrication of Diffractive Light-Collecting Microoptical Device with 1D and 2D Lamellar Grating Structures. International Journal of Manufacturing Engineering،Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-446407
Modern Language Association (MLA)
Lee, ChaBum. Design and Fabrication of Diffractive Light-Collecting Microoptical Device with 1D and 2D Lamellar Grating Structures. International Journal of Manufacturing Engineering No. 2014 (2014), pp.1-7.
https://search.emarefa.net/detail/BIM-446407
American Medical Association (AMA)
Lee, ChaBum. Design and Fabrication of Diffractive Light-Collecting Microoptical Device with 1D and 2D Lamellar Grating Structures. International Journal of Manufacturing Engineering. 2014. Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-446407
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-446407