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We report on generation of strong-field-ionization induced free-space air lasers and explore their applications in remote sensing and molecular physics.
We report on the generation of coherent N2+ emissions in a plasma string driven by two-color laser fields and measure their temporal structures. It is confirmed that the coherent emissions originate from seed-injected amplification.
Process induced variation of contact resistance (Rc) in Ti/graphene (single or multi-layer) devices is investigated physically and electrically. It is proposed that the increased Rc can be attributed to the carbon defects (vacancies) created during SPUTTER process, which is evidenced by Raman spectra. For the first time, the asymmetric behaviors in hole and electron transportation regions in different...
The junction contact characteristics between single layer graphene (SLG) and Ti, where Ti is prepared by various deposition processes, are investigated physically (via Raman) and electrically (via 2-point or 4-point probe measurement and residual resistance methods). For Ti deposited by electron beam evaporation (EBM) process, there are no noticeable Raman shift and weak D band in Ti junction with...
Two-dimensional multicolored arrays of quadratic spatial solitons and up-converted parametric amplifications are observed through cascaded non-collinear quadratic processes in quadratic media, which can be switched by phase-insensitive weak beam control with second harmonic seeding pulses.
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