Details

Autor(en) / Beteiligte

• MacLachlan, A. J.
• Robertson, C. W.
• Cross, A. W.
• Phelps, A. D. R.

Titel

Efficient, 0.35-THz Overmoded Oscillator Based on a Two-Dimensional Periodic Surface Lattice

Ist Teil von

• IEEE transactions on electron devices, 2022-11, Vol.69 (11), p.1-6

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2022

Quelle

IEEE Explore

Beschreibungen/Notizen

• We present the theory, design, and numerical modeling of a cylindrical, two-dimensional periodic surface lattice (2D-PSL) intended for use as the interaction region of an electron beam-driven, pulsed source. The production of 1.95-MW peak, pulsed 0.35-THz radiation with an electronic efficiency of 24% is reported. Mode selection in the oversized cavity, where the diameter D is almost 3.5<inline-formula> <tex-math notation="LaTeX">\times</tex-math> </inline-formula> larger than the operating wavelength <inline-formula> <tex-math notation="LaTeX">\lambda </tex-math> </inline-formula>, is achieved by coupling volume and surface fields to form a coupled cavity eigenmode. We demonstrate the advantages (including enhanced output power and improved spectral purity) of using a 2D-PSL over a simpler 1-D structure. The cylindrical <inline-formula> <tex-math notation="LaTeX">\textit{D}/\lambda \sim \text{3.5}</tex-math> </inline-formula> 2D-PSL demonstrates the "proof-of-principle" high-order mode coupling with the potential to increase <inline-formula> <tex-math notation="LaTeX">\textit{D}/\lambda </tex-math> </inline-formula> to values of 20 or more for the realization of CW 2D-PSL sources or very powerful pulsed sources. The theory is applicable over a broad frequency range.