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Liquid Crystals Pancharatnam-Berry Phase Devices: Fabrication and Applications.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Liquid Crystals Pancharatnam-Berry Phase Devices: Fabrication and Applications./
Author:	Tam, Alwin Ming Wai.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	234 p.
Notes:	Source: Dissertations Abstracts International, Volume: 82-05, Section: B.
Contained By:	Dissertations Abstracts International82-05B.
Subject:	Electrical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28176507
ISBN:	9798664749472

Liquid Crystals Pancharatnam-Berry Phase Devices: Fabrication and Applications.
Tam, Alwin Ming Wai.

Liquid Crystals Pancharatnam-Berry Phase Devices: Fabrication and Applications. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 234 p.

Source: Dissertations Abstracts International, Volume: 82-05, Section: B.

Thesis (Ph.D.)--Hong Kong University of Science and Technology (Hong Kong), 2016.

Recently, PBOE has drawn many attentions in the photonics community as these devices are compact and lightweight, which meets the current need of a compact electro-optical system. Moreover, PBOE exhibits extraordinary polarization dependence property enabling the possibility of polarization optical processing and polarization control of the optical wavefront. In this thesis, we will focus on the realization and the design of various new types of Liquid Crystal PBOE (LC -PBOE) including PB lens (PBL), PB lens array (PBLA), and PB optical vortex lens (PBOVL) using photoalignment via. polarization hologram setup, and discussed their possible applications.Firstly, we have demonstrated the feasibility of using polarization converter hologram setup for realizing the sophisticated microstructure alignment patterning of the newly developed PBL at nanoscale resolution. Over 90% diffract ion efficiency is measured from the fabricated thin film PBL and switchable PBL. The switchable PBL exhibits a fast response time of ~10 ms at low operating voltage (5 V) when changing from lens ‘on’ to lens ‘off’ state. The application of PBL in bifocal eyeglasses, optical zoom camera system, and near-eye augmented reality are discussed.Moreover, we have presented the fabrication of a switchable cylindrical PBLA from a single step photo-alignment exposure. It is shown the PBLA behaves as an electrically switchable diffuser switching from translucent to transparent state and we have demonstrated the possibility of using the device as a transparent display.Furthermore, we have devised and experimentally demonstrated a polarization dependent diffractive bifocal vortex lens that operates via. PB phase. The interaction between the incident beam and the bifocal vortex lens establishes an entanglement between spin and orbital angular momentum (SAM and OAM) of the photon state. The components of the entangled state that is associated with different SAM and OAM can be sorted by the bifocality of the lens. The device is realized using PB phase polarization holography. The applications of the bifocal vortex lens in optical trapping and the realization of OAM laser are discussed. Thus, the bifocal vortex lens can have significant impact in classical and quantum optics, as well as theoretical physics.

ISBN: 9798664749472Subjects--Topical Terms:

596380
Electrical engineering.
Subjects--Index Terms:

Liquid crystals

Liquid Crystals Pancharatnam-Berry Phase Devices: Fabrication and Applications.
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502 $a Thesis (Ph.D.)--Hong Kong University of Science and Technology (Hong Kong), 2016.
520 $a Recently, PBOE has drawn many attentions in the photonics community as these devices are compact and lightweight, which meets the current need of a compact electro-optical system. Moreover, PBOE exhibits extraordinary polarization dependence property enabling the possibility of polarization optical processing and polarization control of the optical wavefront. In this thesis, we will focus on the realization and the design of various new types of Liquid Crystal PBOE (LC -PBOE) including PB lens (PBL), PB lens array (PBLA), and PB optical vortex lens (PBOVL) using photoalignment via. polarization hologram setup, and discussed their possible applications.Firstly, we have demonstrated the feasibility of using polarization converter hologram setup for realizing the sophisticated microstructure alignment patterning of the newly developed PBL at nanoscale resolution. Over 90% diffract ion efficiency is measured from the fabricated thin film PBL and switchable PBL. The switchable PBL exhibits a fast response time of ~10 ms at low operating voltage (5 V) when changing from lens ‘on’ to lens ‘off’ state. The application of PBL in bifocal eyeglasses, optical zoom camera system, and near-eye augmented reality are discussed.Moreover, we have presented the fabrication of a switchable cylindrical PBLA from a single step photo-alignment exposure. It is shown the PBLA behaves as an electrically switchable diffuser switching from translucent to transparent state and we have demonstrated the possibility of using the device as a transparent display.Furthermore, we have devised and experimentally demonstrated a polarization dependent diffractive bifocal vortex lens that operates via. PB phase. The interaction between the incident beam and the bifocal vortex lens establishes an entanglement between spin and orbital angular momentum (SAM and OAM) of the photon state. The components of the entangled state that is associated with different SAM and OAM can be sorted by the bifocality of the lens. The device is realized using PB phase polarization holography. The applications of the bifocal vortex lens in optical trapping and the realization of OAM laser are discussed. Thus, the bifocal vortex lens can have significant impact in classical and quantum optics, as well as theoretical physics.
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