Simple field enhancement formulation for gold bipyramids for application in two-photon luminescence and scattering

2018 ◽  
Author(s):  
James W. M. Chon ◽  
Qiang Sun ◽  
Stuart J. Flanders
Keyword(s):  
Field Enhancement ◽  
Two Photon

scholarly journals Quantitative Measurement of the Near-Field Enhancement of Nanostructures by Two-Photon Polymerization

Langmuir ◽  
2012 ◽  
Vol 28 (24) ◽  
pp. 9041-9046 ◽  
Author(s):  
Tobias Geldhauser ◽  
Andreas Kolloch ◽  
Naoki Murazawa ◽  
Kosei Ueno ◽  
Johannes Boneberg ◽  
...  
Keyword(s):  
Quantitative Measurement ◽  
Near Field ◽  
Field Enhancement ◽  
Two Photon ◽  
Two Photon Polymerization

Two-photon imaging of field enhancement by groups of gold nanostrip antennas

2009 ◽  
Vol 26 (11) ◽  
pp. 2199 ◽  
Author(s):  
Sergey M. Novikov ◽  
Jonas Beermann ◽  
Thomas Søndergaard ◽  
Alexandra E. Boltasseva ◽  
Sergey I. Bozhevolnyi
Keyword(s):  
Field Enhancement ◽  
Two Photon ◽  
Photon Imaging ◽  
Two Photon Imaging

Electric-Field Enhancement Inducing Near-Infrared Two-Photon Absorption in an Indium-Tin Oxide Nanoparticle Film

2012 ◽  
Vol 124 (11) ◽  
pp. 2694-2696
Author(s):  
Akihiro Furube ◽  
Taizo Yoshinaga ◽  
Masayuki Kanehara ◽  
Miharu Eguchi ◽  
Toshiharu Teranishi
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Near Infrared ◽  
Field Enhancement ◽  
Photon Absorption ◽  
Electric Field Enhancement ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Oxide Nanoparticle ◽  
Nanoparticle Film

scholarly journals Probing electron transport in plasmonic molecular junctions with two-photon luminescence spectroscopy

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Qiang Zhang ◽  
Danjun Liu ◽  
Qun Ren ◽  
Nicolae C. Panoiu ◽  
Li Lin ◽  
...  
Keyword(s):  
Electron Transport ◽  
Charge Transport ◽  
Theoretical Calculations ◽  
Near Field ◽  
Field Enhancement ◽  
Molecular Junctions ◽  
Luminescence Spectroscopy ◽  
Excitation Wavelength ◽  
Two Photon ◽  
The Impact

Abstract Plasmonic core–molecule–shell (CMS) nanojunctions provide a versatile platform for studying electron transport through conductive molecules under light excitation. In general, the impact of electron transport on the near-field response of CMS nanojunctions is more prominent than on the far-field property. In this work, we use two-photon luminescence (TPL) spectroscopy to probe the effect of electron transport on the plasmonic properties of gold CMS nanojunctions. Theoretical calculations show that the TPL response of such nanojunctions is closely related to the near-field enhancement inside the metal regions, and can be strongly affected by the electron transport through the embedded molecules. TPL excitation spectroscopy results for three CMS nanojunctions (0.7, 0.9 and 1.5 nm junction widths) reveal no perceivable contribution from their low-energy plasmon modes. This observation can be well explained by a quantum-corrected model, assuming significant conductance for the molecular layers and thus efficient charge transport through the junctions. Furthermore, we explore the charge transport mechanism by investigating the junction width dependent TPL intensity under a given excitation wavelength. Our study contributes to the field of molecular electronic plasmonics through opening up a new avenue for studying quantum charge transport in molecular junctions by non-linear optical spectroscopy.

Two-photon excitation microscopy in cellular biophysics

1995 ◽  
Vol 53 ◽  
pp. 62-63
Author(s):  
David W. Piston ◽  
Brian D. Bennett ◽  
Robert G. Summers
Keyword(s):  
Confocal Microscopy ◽  
Laser Beam ◽  
Duty Cycle ◽  
Excited Electronic State ◽  
Input Power ◽  
Two Photon ◽  
Simultaneous Absorption ◽  
Photon Excitation ◽  
Very High ◽  
Two Photon Excitation

Two-photon excitation microscopy (TPEM) provides attractive advantages over confocal microscopy for three-dimensionally resolved fluorescence imaging and photochemistry. Two-photon excitation arises from the simultaneous absorption of two photons in a single quantitized event whose probability is proportional to the square of the instantaneous intensity. For example, two red photons can cause the transition to an excited electronic state normally reached by absorption in the ultraviolet. In practice, two-photon excitation is made possible by the very high local instantaneous intensity provided by a combination of diffraction-limited focusing of a single laser beam in the microscope and the temporal concentration of 100 femtosecond pulses generated by a mode-locked laser. Resultant peak excitation intensities are 106 times greater than the CW intensities used in confocal microscopy, but the pulse duty cycle of 10-5 maintains the average input power on the order of 10 mW, only slightly greater than the power normally used in confocal microscopy.

Two-photon excitation fluorescence microscopy in living systems

1993 ◽  
Vol 51 ◽  
pp. 154-155 ◽  
Author(s):  
David W. Piston
Keyword(s):  
Confocal Microscopy ◽  
Fluorescence Microscopy ◽  
Singlet State ◽  
Excited Electronic State ◽  
Input Power ◽  
Two Photon ◽  
Simultaneous Absorption ◽  
Photon Excitation ◽  
Very High ◽  
Two Photon Excitation

Two-photon excitation fluorescence microscopy provides attractive advantages over confocal microscopy for three-dimensionally resolved fluorescence imaging. Two-photon excitation arises from the simultaneous absorption of two photons in a single quantitized event whose probability is proportional to the square of the instantaneous intensity. For example, two red photons can cause the transition to an excited electronic state normally reached by absorption in the ultraviolet. In our fluorescence experiments, the final excited state is the same singlet state that is populated during a conventional fluorescence experiment. Thus, the fluorophore exhibits the same emission properties (e.g. wavelength shifts, environmental sensitivity) used in typical biological microscopy studies. In practice, two-photon excitation is made possible by the very high local instantaneous intensity provided by a combination of diffraction-limited focusing of a single laser beam in the microscope and the temporal concentration of 100 femtosecond pulses generated by a mode-locked laser. Resultant peak excitation intensities are 106 times greater than the CW intensities used in confocal microscopy, but the pulse duty cycle of 10−5 maintains the average input power on the order of 10 mW, only slightly greater than the power normally used in confocal microscopy.

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