132
S. Toyouchi et al.
7.5 Conclusion
We have expended the AgNW’s plasmonic waveguide effect from linear to nonlinear
regime, namely remote excitation SHG has been demonstrated as a promising
nanometer-scale pulsed point light source. We hope this tool can open a new field of
remote excitation “nonlinear” spectroscopy. In this chapter, we further demonstrated
the one-color reversible photochromic reactions in a fDAE derivative by using “nonlinear” remote excitation. By interacting with propagating SPPs on AgNW, fDAE
molecules undergo both three-photon cycloreversion and two-photon cyclization
reactions. The PSS of fDAE between closed and open forms can be controlled by
merely tuning one-color NIR laser power. The “nonlinear” remote excitation allows
reducing excitation volume to the sub-diffraction limit dimensions and provides a
unique platform for control of photochemical reaction along AgNWs.
Acknowledgements This work was supported by JSPS KAKENHI (JP17H05458, 17H03003,
18H01948, and 18K19085). The Nakatani Foundation to T. I, The Fund for Scientific
Research-Flanders (FWO, G0D4519N and G081916N), KU Leuven Internal Funds (C14/15/053,
C14/19/079), and the JSPS Core-to-Core Program A. to H. U. are also acknowledged. The work was
partially supported by the RIES International Exchange Program of “Dynamic Alliance for Open
Innovation Bridging Human, Environment and Materials” from MEXT and the Photo-excitonix
Project at Hokkaido University.
References
1. Graff A, Wagner D, Ditlbacher H, Kreibig U (2005) Silver nanowires. Eur Phys J D 34:263–269
2. Wei H, Xu H (2012) Nanowire-based plasmonic waveguides and devices for integrated
nanophotonic circuits. Nanophotonics 1:155–169
3. Xiong X, Zou CL, Ren XF, Liu AP, Ye YX, Sun FW, Guo GC (2013) Silver nanowires for
photonics applications. Laser Photon Rev 1–19
4. Hutchison JA, Centeno SP, Odaka H, Fukumura H, Hofens J, Uji-i H (2009) Subdiffraction
limited, remote excitation of surface enhanced Raman scattering. Nano Lett 9:995–1001
5. Fang Y, Wei H, Hao F, Nordlander P, Xu H (2009) Remote-excitation surface-enhanced Raman
scattering using propagating Ag nanowire plasmons. Nano Lett 9:2049–2053
6. Su L, Lu G, Kenens B, Rocha S, Fron E, Yuan H, Chen C, Dorpe PV, Roeffaers BJ, Mizuno H,
Hofkens J, Hutchison JA, Uji-i H (2015) Visualization of molecular fluorescence point spread
functions via remote excitation switching fluorescence microscopy. Nat. Commun. 6:1–9
7. Lu G, De Keersmaecker H, Su L, Kenens B, Rocha S, Fron E, Chen C, Van Dorpe P, Mizuno H,
Hofkens J, Hutchison JA, Uji-i H (2014) Live-cell SERS endoscopy using plasmonic nanowire
waveguides. Adv Mater 26:5124–5128
8. Halas NJ, Lal S, Chang W-S, Link S, Nordlander P (2011) Plasmons in strongly coupled
metallic nanostructures. Chem Rev 111:3913–3961
9. Huang Y, Fang Y, Zhang Z, Zhu L, Sun M (2014) Nanowire-supported plasmonic waveguide
for remote excitation of surface-enhanced Raman scattering. Light Sci Appl 3:e199
10. Krenn JR, Weeber J-C (2004) Surface plasmon polaritons in metal stripes and wires. Philos
Trans R Soc Lond Ser A 362:739–756
11. Ditlbacher H, Hohenau A, Wagner D, Kreibig U, Rogers M, Hofer F, Aussenegg FR, Krenn
JR (2005) Silver nanowires as surface plasmon resonators. Phys Rev Lett 95:257403
S. Toyouchi et al.
7.5 Conclusion
We have expended the AgNW’s plasmonic waveguide effect from linear to nonlinear
regime, namely remote excitation SHG has been demonstrated as a promising
nanometer-scale pulsed point light source. We hope this tool can open a new field of
remote excitation “nonlinear” spectroscopy. In this chapter, we further demonstrated
the one-color reversible photochromic reactions in a fDAE derivative by using “nonlinear” remote excitation. By interacting with propagating SPPs on AgNW, fDAE
molecules undergo both three-photon cycloreversion and two-photon cyclization
reactions. The PSS of fDAE between closed and open forms can be controlled by
merely tuning one-color NIR laser power. The “nonlinear” remote excitation allows
reducing excitation volume to the sub-diffraction limit dimensions and provides a
unique platform for control of photochemical reaction along AgNWs.
Acknowledgements This work was supported by JSPS KAKENHI (JP17H05458, 17H03003,
18H01948, and 18K19085). The Nakatani Foundation to T. I, The Fund for Scientific
Research-Flanders (FWO, G0D4519N and G081916N), KU Leuven Internal Funds (C14/15/053,
C14/19/079), and the JSPS Core-to-Core Program A. to H. U. are also acknowledged. The work was
partially supported by the RIES International Exchange Program of “Dynamic Alliance for Open
Innovation Bridging Human, Environment and Materials” from MEXT and the Photo-excitonix
Project at Hokkaido University.
References
1. Graff A, Wagner D, Ditlbacher H, Kreibig U (2005) Silver nanowires. Eur Phys J D 34:263–269
2. Wei H, Xu H (2012) Nanowire-based plasmonic waveguides and devices for integrated
nanophotonic circuits. Nanophotonics 1:155–169
3. Xiong X, Zou CL, Ren XF, Liu AP, Ye YX, Sun FW, Guo GC (2013) Silver nanowires for
photonics applications. Laser Photon Rev 1–19
4. Hutchison JA, Centeno SP, Odaka H, Fukumura H, Hofens J, Uji-i H (2009) Subdiffraction
limited, remote excitation of surface enhanced Raman scattering. Nano Lett 9:995–1001
5. Fang Y, Wei H, Hao F, Nordlander P, Xu H (2009) Remote-excitation surface-enhanced Raman
scattering using propagating Ag nanowire plasmons. Nano Lett 9:2049–2053
6. Su L, Lu G, Kenens B, Rocha S, Fron E, Yuan H, Chen C, Dorpe PV, Roeffaers BJ, Mizuno H,
Hofkens J, Hutchison JA, Uji-i H (2015) Visualization of molecular fluorescence point spread
functions via remote excitation switching fluorescence microscopy. Nat. Commun. 6:1–9
7. Lu G, De Keersmaecker H, Su L, Kenens B, Rocha S, Fron E, Chen C, Van Dorpe P, Mizuno H,
Hofkens J, Hutchison JA, Uji-i H (2014) Live-cell SERS endoscopy using plasmonic nanowire
waveguides. Adv Mater 26:5124–5128
8. Halas NJ, Lal S, Chang W-S, Link S, Nordlander P (2011) Plasmons in strongly coupled
metallic nanostructures. Chem Rev 111:3913–3961
9. Huang Y, Fang Y, Zhang Z, Zhu L, Sun M (2014) Nanowire-supported plasmonic waveguide
for remote excitation of surface-enhanced Raman scattering. Light Sci Appl 3:e199
10. Krenn JR, Weeber J-C (2004) Surface plasmon polaritons in metal stripes and wires. Philos
Trans R Soc Lond Ser A 362:739–756
11. Ditlbacher H, Hohenau A, Wagner D, Kreibig U, Rogers M, Hofer F, Aussenegg FR, Krenn
JR (2005) Silver nanowires as surface plasmon resonators. Phys Rev Lett 95:257403