TY - JOUR AU - James Lloyd-Hughes AU - Peter Oppeneer AU - Tatiane Santos AU - Andre Schleife AU - Sheng Meng AU - Michael Sentef AU - Michael Ruggenthaler AU - Angel Rubio AU - Ilie Radu AU - Margaret Murnane AU - Xun Shi AU - Henry Kapteyn AU - Benjamin Stadtmüller AU - Keshav Dani AU - Felipe da Jornada AU - Eva Prinz AU - Martin Aeschlimann AU - Rebecca Milot AU - Maria Burdanova AU - Jessica Boland AU - Tyler Cocker AU - Frank Hegmann AB - In the 60 years since the invention of the laser, the scientific community has developed numerous fields of research based on these bright, coherent light sources, including the areas of imaging, spectroscopy, materials processing and communications. Ultrafast spectroscopy and imaging techniques are at the forefront of research into the light-matter interaction at the shortest times accessible to experiments, ranging from a few attoseconds to nanoseconds. Light pulses provide a crucial probe of the dynamical motion of charges, spins, and atoms on picosecond, femtosecond, and down to attosecond timescales, none of which are accessible even with the fastest electronic devices. Furthermore, strong light pulses can drive materials into unusual phases, with exotic properties. In this Roadmap we describe the current state-of-the-art in experimental and theoretical studies of condensed matter using ultrafast probes. In each contribution, the authors also use their extensive knowledge to highlight challenges and predict future trends. BT - Journal of Physics: Condensed Matter DA - 2021-07 DO - 10.1088/1361-648X/abfe21 N2 - In the 60 years since the invention of the laser, the scientific community has developed numerous fields of research based on these bright, coherent light sources, including the areas of imaging, spectroscopy, materials processing and communications. Ultrafast spectroscopy and imaging techniques are at the forefront of research into the light-matter interaction at the shortest times accessible to experiments, ranging from a few attoseconds to nanoseconds. Light pulses provide a crucial probe of the dynamical motion of charges, spins, and atoms on picosecond, femtosecond, and down to attosecond timescales, none of which are accessible even with the fastest electronic devices. Furthermore, strong light pulses can drive materials into unusual phases, with exotic properties. In this Roadmap we describe the current state-of-the-art in experimental and theoretical studies of condensed matter using ultrafast probes. In each contribution, the authors also use their extensive knowledge to highlight challenges and predict future trends. PY - 2021 EP - in press T2 - Journal of Physics: Condensed Matter TI - The 2021 Ultrafast Spectroscopic Probes of Condensed Matter Roadmap UR - http://iopscience.iop.org/article/10.1088/1361-648X/abfe21 VL - 33 ER -