Acta Physica Sinica, Volume. 69, Issue 18, 189101-1(2020)
Fig. 1. Schematic illustration of the mechanism of mode-locking[3].
Fig. 2. Schematic illustrating the collective oscillations of conduction electrons in response to an external electric field for nanoparticles[41].
Fig. 3. LSPR frequency dependence on free carrier density and doping constraints[49].
Fig. 4. Photoexcitation and relaxation of metallic nanoparticles: (a)−(d) Photoexcitation and subsequent relaxation processes following the illumination of a metal nanoparticle with a laser pulse, and characteristic timescales[42].
Fig. 5. Energy-level structure of a two-energy level system and the process of stimulated absorption.
Fig. 6. Absorption spectrμm and pulse laser generation of Gold nanorods (GNRs): (a) Transmission electron microscope image, the inset of (a) shows the photograph of the GNRs solution; (b) absorption spectrum of GNRs from 400 to 3200 nm; (c) the finite-difference time-domain simulation results of the absorption cross section of one, two, three, and four GNRs concatenated; (d) experiment schematic of a tunable passively
Fig. 7. Experimental preparation and characterization of
Fig. 8. Schematic representation of the common doping mechanisms in metal oxides relative to a basic lattice containing metal cations (orange spheres) and oxygen anions (red spheres)[66].
Fig. 9. Nonlinear properties of Cu2–
Fig. 10. Nonlinear optical response and ultrafast transient optical response of the ITO nanocrystals in ENZ region: (a) Typical transmission electron microscope images of ITO nanocrystals, with an average diameter of about 9 nm, the inset shows a photograph of the colloidal solution of ITO nanocrystals and a high resolution transmission electron microscope image of a single ITO nanocrystals; (b) normalized optical extinction spectra of the ITO nanocrystals with different doping levels; (c) wavelength dependent real part of the permittivity of the spin-coated ITO nanocrystals thin films; (d) Z-scan trace of a PVA film containing ITO nanocrystals recorded at 1.3 μm, ITO-12 shows notable saturable absorption, as compared to the undoped In2O3; (e) transient bleaching dynamics of ITO-10 nanocrystals film (spin-coated on quartz slid) under different pump fluence. Solid line shows the fitting with a single exponential decay function[70].
Fig. 11. The
Fig. 12. Characterizations of 2D MoO3 nanosheets: (a) Atomic force microscope image; (b) VIS-NIR absorption spectra for the colloidal dispersions of pristine MoO3 nanosheets and plasmonic (photoactivated) MoO3 nanosheets; the inset is the corresponding photographs; (c) dependence of transmission as a function of input power for plasmonic 2D MoO3; (d) optical spectrum; (e) pulse train; (f) pulse duration[72].
Fig. 13. Ultrafast pulse laser generation and
Fig. 14. Different plasmonic materials corresponding LSPR wavelength.
|
Get Citation
Copy Citation Text
Duo-Duo Zhang, Xiao-Feng Liu, Jian-Rong Qiu.
Received: Mar. 27, 2020
Accepted: --
Published Online: Jan. 5, 2021
The Author Email: Qiu Jian-Rong (qjr@zju.edu.cn)