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Non-Hermitian Topological Photonics:...

Zhao, Han .

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Non-Hermitian Topological Photonics: From Concepts to Applications.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Non-Hermitian Topological Photonics: From Concepts to Applications./
作者:	Zhao, Han .
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	93 p.
附註:	Source: Dissertations Abstracts International, Volume: 81-09, Section: B.
Contained By:	Dissertations Abstracts International81-09B.
標題:	Optics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27544454
ISBN:	9781392592915

Non-Hermitian Topological Photonics: From Concepts to Applications.
Zhao, Han .

Non-Hermitian Topological Photonics: From Concepts to Applications. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 93 p.

Source: Dissertations Abstracts International, Volume: 81-09, Section: B.

Thesis (Ph.D.)--University of Pennsylvania, 2019.

This item must not be sold to any third party vendors.

Recent emergence of photonic topological insulators paves a route to disorder-immune light confinement and propagation for potential applications in information processing, communication, and computing. In parallel, non-Hermitian photonics based on parity-time symmetry expands the design principles in optics to the entire complex domain of materials permittivity, providing a versatile toolbox to enable novel photonic functionality. Despite being fundamentally different, photonic topological structures integrated with optical non-Hermiticity exhibit unusual features that leverage robust light control with extraordinary degrees of freedom. This dissertation explores the synergy of topological photonics and non-Hermitian physics from the demonstrations of phenomena to the prototype of devices. We start with a complex-indexed variant of the classical Su-Schrieffer-Heeger model respecting the charge-conjugation symmetry, where non-Hermitian modulation of gain and loss enforces robust single-mode lasing with the topological zero mode selectively enhanced in a hybrid microlaser array. Beyond the selection of the topological mode, we show the creation of a topological state in the bulk of a topologically uniform photonic lattice via strategic patterning of optical non-Hermiticity, even in the absence of a topological interface. Such novel non-Hermitian control enables arbitrary topological light steering in reconfigurable non-Hermitian junctions, where chiral topological states can propagate at an interface of the gain and loss domains dynamically configured by pumping patterns. Our strategy has solved the long-standing problem of redefining the topological domain wall without altering the topological order of the structure, which would be otherwise static. The ultra-flexible and robust nature of the non-Hermitian topological light control opens the avenue to highly integrated multifunctional photonic circuitry for high-density data processing. Additionally, we exploit the highly asymmetric light transport feature associated with the unique topology in the vicinity of the non-Hermitian degeneracy, namely an exceptional point, facilitating sensitive thermal imaging and power-efficient interferometric optical modulation on-chip.

ISBN: 9781392592915Subjects--Topical Terms:

517925
Optics.
Subjects--Index Terms:

Photonic topological insulators

Non-Hermitian Topological Photonics: From Concepts to Applications.
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