Pérez Benito, ÓscarWeigand Talavera, Rosa María2025-01-132025-01-132019-10-15Óscar Pérez-Benito and Rosa Weigand, "Nano–dispersion–scan: measurement of sub-7-fs laser pulses using second-harmonic nanoparticles," Opt. Lett. 44, 4921-4924 (2019)0146-959210.1364/OL.44.004921https://hdl.handle.net/20.500.14352/113869Se deposita la versión final de los autores (postprint)We demonstrate the measurement and retrieval of sub-7 fs laser pulses from a broadband Ti:Sa oscillator using ensembles of commercially available second-harmonic (SH) nanoparticles (NPs) and dispersion-scan (d-scan). Scattering adds an incoherent component to the d-scan trace and our retrieval procedure allows for correctly the trace. Comparison with a thin crystal (BBO, Beta Barium Borate) gave consistent pulse durations (6.56 ± 0.03 fs for BBO and 6.5 ± 0.1 fs for the NPs). These results pave the way to using ensembles of NPs for the measurement of ultrashort light pulses with ultrabroadband spectra at room temperature with standard spectrometers, in any spectral range.engjournal article1539-4794https://doi.org/10.1364/OL.44.004921https://opg.optica.org/ol/fulltext.cfm?uri=ol-44-20-4921&id=421829open access535Óptica (Física)2209.19 Óptica Física