Enhanced coherent phonon excitation in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>Fe</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>GeTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> via resonance Raman effect

Coherent phonon excitation via femtosecond laser pulses can be used to control physical properties of matter, and enhancing coherent is highly relevant. Here, we report the strong enhancement in ${\mathrm{Fe}}_{3}{\mathrm{GeTe}}_{2}$ (FGT) resonance Raman effect. On basis transient optical spectroscopy measurements, ${A}_{1\mathrm{g}}$ FGT obtained as a function pump photon energy. Its maximized by tuning The maximum at 1.574-eV energy corresponds an electronic transition FGT, direct result generation follows impulsive stimulated scattering mechanism. Our work demonstrates that effect effective way enhance excitation.