Design and transformation of three dimensional pupils : diffractive and subwavelength

Three dimensional pupils are investigated in both diffractive and subwavelength regimes and in various applications to shape the flow of light. In diffractive regime, volume holograms are good candidates for pupils of optical imaging systems thanks to their three--dimensional structure, which provides richer design flexibility compared to conventional two--dimensional pupils. In this thesis, I will propose the system design as well as the optimization of depth selectivity for enhancing the signal--to--noise ratio of ground--based imaging system for the detection of artificial satellites. In addition, deformations of volume hologram pupils promise additional opportunities to design further, more sophisticated point spread functions which are potentially useful for many imaging purposes. Deformations using multiple point indenters will be investigated in terms of both forward and inverse problems. Bulk transformation is a more general approach for pupil design. The physical relationship between transformation and resulting point spread function will be discussed by deriving the corresponding analytical expressions. In subwavelength regime, I will explore the realization of key materials properties including inhomogeneity and anisotropy. Anisotropy can be implemented by elliptical rod lattices; and with anisotropy, cloaking and accommodation of different components of an optical device become possible. Inhomogeneity is discussed in the context of gradient--index media. The additional thin--film wave guidance effect along the third dimension due to fabrication constraints is investigated in detail with the proposal of an all--analytical solution.

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2014

Author dc:creator

• Gao, Hanhong

Advisor dc:contributor.advisor

• George Barbastathis.

• Electrical Engineering and Computer Science.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/91040

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/91040