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A high-energy, low threshold THz-wave output has been experimentally demonstrated with intracavity terahertz-wave parametric oscillator based on surface-emitted configuration. The maximum THz-wave output energy of 283nJ/pulse was obtained at 1.54THz under the pump threshold of 12.9mJ/pulse in the cavity. The continuously tunable range from 0.75 to 2.75 THz was realized.
We demonstrate semiconductor resonators operating on the fundamental monopolar resonance which corresponds to the fundamental oscillation mode of split-ring resonators. Their size is considerably below the optical diffraction limit in all three dimensions of space. The maximum confinement is obtained for resonators operating at a wavelength of λ ∼ 272 μm (v ∼ 1.1 THz): they have a diameter of 13 μm...
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