Linear and nonlinear excitation induced ultrafast absorption dynamics in laser ablated and chemically synthesized gold nanoparticle colloids

Low Efficiency of Laser Heating of Gold Particles at the Plasmon Resonance: An X-ray Calorimetry Study

“…This may be complicated by morphology effects in particles of different synthesis origins. 19,20 The general notion is that gold nanoparticle excitation close to the surface plasmon resonance (SPR), which can be reached at 532 nm for gold spheres of sizes between 5 and 100 nm is favorable for most efficient excitation and for utilizing near-field effects to obtain localized excitation on the nanoscale. 21 Yet, lower efficiency at the SPR as compared to shorter wavelengths at the interband transition of gold have been described.…”

“…We have recently noticed that the transient lattice expansion, representing particle heating after picosecond laser excitation of gold nanospheres, or nanorods was found to be less than predicted by optical calculations, if the plasmon-resonant wavelength of 532 nm, respectively 800 nm (for rods), is used. This may be complicated by morphology effects in particles of different synthesis origins. , …”