Plasmon resonance induced photoconductivity of ZrO2(Y) films with embedded Au nanoparticles

18th Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics

Liskin, D.A.^1 ; Filatov, D.O.^2 ; Gorshkov, O.N.^2 ; Gorshkov, A.P.^1,2 ; Antonov, I.N.^2 ; Shenina, M.E.^2 ; Zubkov, S.Y.^2 ; Sinutkin, D.S.^1

Department of Physics, Lobachevsky State University of Nizhny Novgorod, Nizhny, Novgorod

603950, Russia^1

Research and Educational Center for Physics of Solid State Nanostructures, Lobachevsky State University of Nizhny Novgorod, Nizhny, Novgorod

603950, Russia^2

关键词: Au film;    Electron transport;    Layered arrays;    Photoresponses;    Plasmon oscillations;    Plasmon resonances;    Temperature dependencies;    Ultra-thin;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/816/1/012010/pdf
DOI  :  10.1088/1742-6596/816/1/012010

来源: IOP

【 摘 要 】

We report on the experimental observation of photoconductivity (PC) in ultrathin (≈ 40 nm thick) ZrO2(Y) films with single layered arrays of Au nanoparticles (NPs) of 1 to 3 nm in diameter. The samples were prepared by the deposition of islanded Au films of ∼1 nm in thickness sandwiched between two ZrO2(Y) layers by Magnetron Sputtering followed by annealing. The effect of PC was attributed to the photoexcitation of the collective plasmon oscillations in dense Au NP arrays. The temperature dependencies and kinetics of PC have been studied. At 300 K, the PC has been found to originate mainly from heating of ZrO2(Y) due to plasmon optical absorption in Au NPs (the bolometric effect). At 77 K, the photoresponse has been attributed to plasmon-assisted electron transport between NPs via the vacancy α-band in ZrO2(Y) barriers.