Figure 2
From: Intense multicycle THz pulse generation from laser-produced nanoplasmas
Temporal profiles of (a) total emitted radiation, (b) filtered beat-frequency radiation in vacuum, measured by the virtual point probes; P1, P2, P3, and P4, located \(10\;\upmu \text {m}\) away from the emission spot, and (c–d) their corresponding power spectra.
