Dispersive Temporal Interferometry toward Single?Shot Probing Ultrashort Time Signal with Attosecond Resolution

With the intensive research on ultrafast dynamics in physics and chemistry, single-shot measurement of ultrashort time change has become increasingly important. The most advanced oscilloscope with time-lens technique possesses subpicosecond resolution, while interferometer can probe event within one optical cycle. However, difference beyond cycle but less than time-lens’ resolution is still inaccessible. Herein, a technique, dispersive temporal (DTI), to break through gap between lens measurement, reported. concept an analogy spatial interference: pulse passes two paths assemble into pair, interference arises after large dispersion, which record imposed change. Experimentally, it measured that its sub-20 as (0.004 cycle) over range larger 2 ps (400 cycle), range-to-resolution ratio 105 sampling rate 42.8 MHz. Moreover, DTI-based gyroscope sensitivity 348 as/(deg s?1) fabricated demonstrate applications sensors. This precisely monitor attosecond prosperous application prospect capturing process.