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Master's Thesis
Author of thesis: Ing. Matěj Horáček
Acad. year: 2014/2015
Supervisor: prof. RNDr. Tomáš Šikola, CSc.
Reviewer: RNDr. Zdenka Hájková, Ph.D.
Two rich and vibrant fields of investigation - graphene and plasmonics - strongly overlap in this work, giving rise to a novel hybrid photodetection device. The intrinsic photoresponse of graphene is significantly enhanced by placing the gold nanorods exhibiting unique anisotropic localized surface plasmon resonances on the graphene surface. The reported enhanced photoresponse of graphene is caused by the redistribution of localized surface plasmons in the nanoparticles into graphene. The exact underlying energy redistribution mechanism is thoroughly studied by a single particle scattering spectroscopy monitoring the particle plasmon linewidth as a function of the number of underlaying graphene layers. The obtained extraordinary plasmon broadening for nanoparticles placed on graphene suggests the contribution of a novel energy redistribution channel attributed to the injection of hot electrons from gold nanorods into graphene.
graphene, plasmonics, photodetection, LSPR, plasmon damping, gold nanorod, hot electrons, single particle scattering spectroscopy
Date of defence
22.06.2015
Result of the defence
Defended (thesis was successfully defended)
Grading
A
Language of thesis
Czech
Faculty
Fakulta strojního inženýrství
Department
Institute of Physical Engineering
Study programme
Applied Sciences in Engineering (N3901-2)
Field of study
Physical Engineering and Nanotechnology (M-FIN)
Composition of Committee
prof. RNDr. Tomáš Šikola, CSc. (předseda) prof. RNDr. Miroslav Liška, DrSc. (místopředseda) prof. RNDr. Bohumila Lencová, CSc. (člen) prof. RNDr. Jiří Komrska, CSc. (člen) prof. RNDr. Petr Dub, CSc. (člen) prof. RNDr. Radim Chmelík, Ph.D. (člen) prof. RNDr. Jiří Spousta, Ph.D. (člen) prof. Ing. Ivan Křupka, Ph.D. (člen) prof. RNDr. Pavel Zemánek, Ph.D. (člen) RNDr. Antonín Fejfar, CSc. (člen)
Supervisor’s reportprof. RNDr. Tomáš Šikola, CSc.
Grade proposed by supervisor: A
Reviewer’s reportRNDr. Zdenka Hájková, Ph.D.
Grade proposed by reviewer: A
Responsibility: Mgr. et Mgr. Hana Odstrčilová