Cavity spintronics: foundations and applications of spin-photon hybridization

Simple item page
dc.contributor.authorHarder, Michael
dc.contributor.examiningcommitteeGwinner, Gerald (Physics and Astronomy)en_US
dc.contributor.examiningcommitteeSirker, Jesko (Physics and Astronomy)en_US
dc.contributor.examiningcommitteeShafai, Lotfollah (Electrical and Computer Engineering)en_US
dc.contributor.examiningcommitteeCamley, Robert (University of Colorado Colorado Springs)en_US
dc.contributor.supervisorHu, Can-Ming (Physics and Astronomy)en_US
dc.date.accessioned2018-09-11T18:20:49Z
dc.date.available2018-09-11T18:20:49Z
dc.date.issued2018-08en_US
dc.date.submitted2018-08-17T20:46:10Zen
dc.date.submitted2018-09-11T15:36:46Zen
dc.degree.disciplinePhysics and Astronomyen_US
dc.degree.levelDoctor of Philosophy (Ph.D.)en_US
dc.description.abstractLight-matter interactions lie at the heart of condensed matter physics, providing physical insight into material behaviour while enabling the design of new devices. Perhaps this is most evident in the push to develop quantum information and spintronic technologies. On the side of quantum information, engineered light-matter interactions offer a means to drastically enhance coherence rates, while at the same time new insights into spin-photon manipulation would benefit the development of spintronic technologies. In this context the recent discovery of hybridization between ferromagnets and cavity photons has ushered in a new era of light-matter exploration at the crossroads of quantum information and spintronics. The key player in this rapidly developing field of cavity spintronics is a new type of quasiparticle, the cavity-magnon-polariton. In this dissertation we explore the fundamental behaviour of the cavity-magnon-polariton and exploit its unique properties to develop new spintronic applications. To understand the physical origins of spin-photon hybridization we develop a comprehensive theoretical framework, relating the basic characteristics of hybridization to a universal model of coupled oscillators, revealing the physical origin of the coupling through electrodynamic phase correlation, and describing detailed properties through a quantum approach. Based on this foundation we have performed in depth experimental investigations of the coupled spin-photon system. We discover that the coupling will influence spin current generated through the spin pumping mechanism, demonstrating a firm link between spin-photon coupling and spintronics. We also develop several in-situ coupling control mechanisms, which offer both physical insight and a means to develop cavity spintronic technologies. As one example, we have combined our local spin current detection technique and coupling control mechanism to realize non-local spin current manipulation over distances of several centimetres. Therefore by revealing the electrodynamic nature of strong spin-photon coupling, developing new control mechanisms, and demonstrating the influence on spin current, this dissertation sets the foundation of cavity spintronics, opening the door to the implementation of strong spin-photon coupling for new spintronic and quantum information technologies.en_US
dc.description.noteOctober 2018en_US
dc.identifier.citationM. Harder, L. H. Bai, P. Hyde and C.-M. Hu, Phys. Rev. B 95, 214411 (2017).en_US
dc.identifier.citationM. Harder, L. H. Bai, C. Match, J. Sirker and C.-M. Hu, Sci. China Phys. Mech. Astron. 59, 117511 (2016).en_US
dc.identifier.citationH. Maier-Flaig, M. Harder, S. Klingler, Z. Qiu, E. Saitoh, M. Weiler, S. Geprägs, R. Gross, S. T. B. Goennenwein and H. Huebl, Appl. Phys. Lett. 110, 132401 (2017).en_US
dc.identifier.citationM. Harder, P. Hyde, L. H. Bai, C. Match and C.-M. Hu, Phys. Rev. B 94, 054403 (2016).en_US
dc.identifier.citationH. Maier-Flaig, M. Harder, R. Gross, H. Huebl and S. T. B. Goennenwein, Phys. Rev. B 94, 054433 (2016).en_US
dc.identifier.citationL. H. Bai, K. Blanchette, M. Harder, Y. P. Chen, X. Fan, J. Q. Xiao and C.-M. Hu, IEEE Trans. Magn. 52, 1000107 (2016).en_US
dc.identifier.citationL. H. Bai, M. Harder, Y. P. Chen, X. Fan, J. Q. Xiao and C.-M. Hu, Phys. Rev. Lett. 114, 227201 (2015).en_US
dc.identifier.citationL. H. Bai, M. Harder, P. Hyde, Z. H. Zhang, C.-M. Hu, Y. P. Chen and J. Q. Xiao, Phys. Rev. Lett. 118, 217201 (2017).en_US
dc.identifier.urihttp://hdl.handle.net/1993/33308
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectPhysicsen_US
dc.subjectMagnetismen_US
dc.subjectSpintronicsen_US
dc.subjectLight-matter interactionsen_US
dc.subjectPolaritonsen_US
dc.subjectCavity-magnon-polaritonen_US
dc.subjectCavity spintronicsen_US
dc.subjectSpin-photon couplingen_US
dc.titleCavity spintronics: foundations and applications of spin-photon hybridizationen_US
dc.typedoctoral thesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
harder_michael.pdf
Size:
24.56 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.2 KB
Format:
Item-specific license agreed to upon submission
Description:
Download
Collections
FGS - Electronic Theses and Practica