Low-Power Phase Transition of Chalcogenide Glass Using Au Nanoparticle Plasmon Resonance

Cao, Tun1; Liu, Kuan1; Lu, Li2; Liu, Jianxun3; Liu, Yan Jun3; Qin, Kai Rong1; Chui, Hsiang Chen1; Simpson, Robert E.2

2020-01-13

10.1002/adom.201901570

Advanced Optical Materials   影响因子和分区

2195-1071

Chalcogenide materials are attractive for all-photonic phase-change memories owing to their large optical contrast between amorphous and crystalline structural phases. However, high-power heating pulses are required to switch these structural phases, which can limit the cyclability. To reduce power, Au nanoparticles (NPs) are embedded in a typical chalcogenide phase-change material, Ge2Sb2Te5 (GST). Raman analysis shows that a GST film crystallizes at a low optical power of 2 mW, which is almost 10 times lower than that of materials not embedded with NPs. This lower power is owing to the enhanced light absorptance through the strongly localized surface plasmon resonance (LSPR) of the Au NPs. The Au NPs embedded in the GST film scatter light at lambda = 587 nm, which is close to Au NP's LSPR of approximate to 535 nm. Laser light at 532 nm is used to measure Raman scattering from the Au-GST system. The Raman scattering is enhanced by a factor 12 compared with a bare GST film. This study indicates that the GST film-Au NP system is suitable for high-speed, low-power, phase-change memory and for a new type of tunable surface-enhanced Raman scattering substrate.

mid-infrared phase-change materials surface-enhanced Raman scattering surface plasmon resonance tunable

SCI ; EI

英语

通讯

Program for Liaoning Excellent Talents in University[LJQ2015021]

Materials Science ; Optics

Materials Science, Multidisciplinary ; Optics

WOS:000506920700001

WILEY-V C H VERLAG GMBH

20200308039048

Antimony compounds ; Chalcogenides ; Phase change memory ; Tellurium compounds ; Surface plasmon resonance ; Surface scattering ; Raman scattering ; Germanium compounds ; Glass transition ; Gold compounds ; Gold nanoparticles

Data Storage, Equipment and Techniques:722.1 ; Light/Optics:741.1 ; Nanotechnology:761 ; Chemical Operations:802.3 ; Inorganic Compounds:804.2 ; Classical Physics; Quantum Theory; Relativity:931

Web of Science

1.Dalian Univ Technol, Sch Optoelect Engn & Instrumentat Sci, Dalian 116024, Peoples R China
2.Singapore Univ Technol & Design, Singapore 487372, Singapore
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Cao, Tun,Liu, Kuan,Lu, Li,et al. Low-Power Phase Transition of Chalcogenide Glass Using Au Nanoparticle Plasmon Resonance[J]. Advanced Optical Materials,2020,8(6).

Cao, Tun.,Liu, Kuan.,Lu, Li.,Liu, Jianxun.,Liu, Yan Jun.,...&Simpson, Robert E..(2020).Low-Power Phase Transition of Chalcogenide Glass Using Au Nanoparticle Plasmon Resonance.Advanced Optical Materials,8(6).

Cao, Tun,et al."Low-Power Phase Transition of Chalcogenide Glass Using Au Nanoparticle Plasmon Resonance".Advanced Optical Materials 8.6(2020).