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Direct molecular-level near-field plasmon and temperature assessment in a single plasmonic hotspot

Light(Science & Applications) 2020年第1期9卷 1673-1685页

作者： Marie Richard-Lacroix volker deckert Leibniz Institute of Photonic Technology(IPHT) Albert-Einstein-Strasse 9D-07745 JenaGermany Institute of Physical Chemistry and Abbe Center of Photonics University of JenaHelmholtzweg 4D-07743 JenaGermany

Tip-enhanced Raman spectroscopy(TERS)is currently widely recognized as an essential but still emergent technique for exploring the ***,our lack of comprehension of crucial parameters still limits its potential as a user-friendly analytical *** tip’s surface plasmon resonance,heating due to near-field temperature rise,and spatial resolution are undoubtedly three challenging experimental parameters to ***,they are also the most fundamentally relevant parameters to explore,because they ultimately influence the state of the investigated molecule and consequently the probed *** we propose a straightforward and purely experimental method to access quantitative information of the plasmon resonance and near-field temperature experienced exclusively by the molecules directly contributing to the TERS *** detailed near-field optical response,both at the molecular level and as a function of time,is evaluated using standard TERS experimental equipment by simultaneously probing the Stokes and anti-Stokes spectral ***-assembled 16-mercaptohexadodecanoic acid monolayers covalently bond to an ultra-flat gold surface were used as a *** of blinking lines in the spectra also provides crucial information on the lateral resolution and indication of atomic-scale thermally induced morphological changes of the tip during the *** study provides access to unprecedented molecular-level information on physical parameters that crucially affect experiments under TERS *** study thereby improves the usability of TERS in day-to-day *** obtained information is of central importance for any experimental plasmonic investigation and for the application of TERS in the field of nanoscale thermometry.

关键词： straight purely thereby

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Plasmon-assisted mode selection lasing in a lanthanide-based microcavity

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Advanced Photonics 2024年第3期6卷 35-41页

作者： Lei Guo Min Ji Bowen Kang Min Zhang Xin Xie Zihao Wu Huan Chen volker deckert Zhenglong Zhang Shaanxi Normal University School of Physics and Information TechnologyXi’anChina Friedrich-Schiller University Leibniz Institute of Photonic TechnologyJenaGermany

Lanthanide-based microlasers have attracted considerable attention owing to their large anti-Stokes shifts,multiple emission bands,and narrow *** applications of microlasers,such as optical communication,optical storage,and polarization imaging,require selecting the appropriate laser polarization mode and remote control of the laser ***,we propose a unique plasmon-assisted method for the mode selection and remote control of microlasing using a lanthanide-based microcavity coupled with surface plasmon polaritons(SPPs)that propagate on a silver *** this method,the transverse electrical(TE)mode of microlasers can be easily separated from the transverse magnetic(TM)*** the SPPs excited on the silver microplate only support TM mode propagation,the reserved TE mode is resonance-enhanced in the microcavity and amplified by the local electromagnetic ***,lasingmode splitting can be observed under the near-field excitation of SPPs due to the coherent coupling between the microcavity and mirror microcavity *** from the long-distance propagation characteristics of tens of micrometers of SPPs on a silver microplate,remote excitation and control of upconversion microlasing can also be *** plasmon-assisted polarization mode-optional and remote-controllable upconversion microlasers have promising prospects in on-chip optoelectronic devices,encrypted optical information transmission,and high-precision sensors.

关键词： lanthanide-based microlaser surface plasmon polaritons polarization mode selection

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