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ADDITIVE LITHOGRAPHY FABRICATION AND INTEGRATION OF MICRO OPTICS
- Date Issued:
- 2006
- Abstract/Description:
- Optical elements are the fundamental components in photonic systems and are used to transform an input optical beam into a desired beam profile or to couple the input beam into waveguides, fibers, or other optical systems or devices. Macroscopic optical elements are easily fabricated using grinding and polishing techniques, but few methods exist for inexpensive fabrication of micro optical elements. In this work we present an innovative technique termed Additive Lithography that makes use of binary masks and controlled partial exposures to sculpt photoresist into the desired optical surface relief profile. We explore various masking schemes for fabricating a variety of optical elements with unprecedented flexibility and precision. These masking schemes used in conjunction with the additive lithographic method allows us to carefully control the photoresist exposure and reflow processes for fabricating complex aspheric lens elements, including aspheric elements whose fabrication often proves highly problematic. It will be demonstrated that employing additive lithography for volume sculpting followed by controlled reflow can also allow us to fabricate refractive beam shaping elements. Finally we will discuss the dry etching techniques used to transfer these optical elements into the glass substrate. Thus the additive lithography technique will be demonstrated as an inexpensive, high throughput and efficient process in the fabrication of micro optical elements.
Title: | ADDITIVE LITHOGRAPHY FABRICATION AND INTEGRATION OF MICRO OPTICS. |
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Name(s): |
Pitchumani, Mahesh, Author Johnson, Eric, Committee Chair University of Central Florida, Degree Grantor |
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Type of Resource: | text | |
Date Issued: | 2006 | |
Publisher: | University of Central Florida | |
Language(s): | English | |
Abstract/Description: | Optical elements are the fundamental components in photonic systems and are used to transform an input optical beam into a desired beam profile or to couple the input beam into waveguides, fibers, or other optical systems or devices. Macroscopic optical elements are easily fabricated using grinding and polishing techniques, but few methods exist for inexpensive fabrication of micro optical elements. In this work we present an innovative technique termed Additive Lithography that makes use of binary masks and controlled partial exposures to sculpt photoresist into the desired optical surface relief profile. We explore various masking schemes for fabricating a variety of optical elements with unprecedented flexibility and precision. These masking schemes used in conjunction with the additive lithographic method allows us to carefully control the photoresist exposure and reflow processes for fabricating complex aspheric lens elements, including aspheric elements whose fabrication often proves highly problematic. It will be demonstrated that employing additive lithography for volume sculpting followed by controlled reflow can also allow us to fabricate refractive beam shaping elements. Finally we will discuss the dry etching techniques used to transfer these optical elements into the glass substrate. Thus the additive lithography technique will be demonstrated as an inexpensive, high throughput and efficient process in the fabrication of micro optical elements. | |
Identifier: | CFE0000914 (IID), ucf:46761 (fedora) | |
Note(s): |
2006-05-01 Ph.D. Optics and Photonics, Doctorate This record was generated from author submitted information. |
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Subject(s): |
additive lithography lithography micro optics diffractive optical elements DOE etching RIE ICP fused silica selectivity lens toroidal vortex |
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Persistent Link to This Record: | http://purl.flvc.org/ucf/fd/CFE0000914 | |
Restrictions on Access: | public | |
Host Institution: | UCF |