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TMDs represent one of the most promising option for new devices characterized by high performances for opto-and nanoelectronics applications. Top-down schemes have been fruitfully exploited for the tuning of TMDs physics by stain engineering in exfoliated flakes. We propose an original bottom-up strategy based on the CVD growth of MoS 2 on anisotropic substrates and its characterization by means of pump-probe spectroscopy. The ultrafast response of the rippled MoS 2 reveals strongly anisotropic. While the transient absorption emerges as independent from the orientation of the pump beam polarization, the angle between the probe beam polarization and the ripples induces remarkable effects. Within an orthogonal geometry, both the overall intensity of the transient spectrum and the el-ph scattering decay time are halved while the photo-bleaching at 450 nm is blueshifted with respect to the parallel …
Publication date: 
1 Mar 2017

Eugenio Cinquanta, Andrea Camellini, Christian Martella, Carlo Mennucci, Alessio Lamperti, Giuseppe Della Valle, Margherita Zavelani Rossi, Francesco Buatier de Mongeot, Alessandro Molle, Salvatore Stagira

Biblio References: 
Volume: 2017 Pages: V30. 013