Subterahertz Photonic Crystal Klystron Amplifier

J. C. Stephens, G. Rosenzweig, M. A. Shapiro, R. J. Temkin, J. C. Tucek, K. E. Kreischer

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

This Letter reports the successful experimental demonstration of amplification of subterahertz radiation in a klystron with photonic crystal cavities. The klystron has six cavities, with each cavity having a series of oversized photonic crystal cells made up of a 5×3 array of square posts. The center post is removed from each cell to form a highly oversized (0.8 mm∼λ/4) beam tunnel, with power coupling from cell to cell through the tunnel. The pulsed electron beam is operated at 23.5 kV, 330 mA in a 0.5 T solenoidal field. At 93.7 GHz, a small-signal gain of 26 dB and a saturated output power of 30 W are obtained. Experimental results are in very good agreement with the predictions of a particle-in-cell code. The successful achievement of high gain operation of a photonic crystal klystron amplifier is promising for the future extension of klystron operation well into the terahertz frequency region.

Original languageEnglish
Article number244801
JournalPhysical Review Letters
Volume123
Issue number24
DOIs
StatePublished - Dec 12 2019

Fingerprint

Dive into the research topics of 'Subterahertz Photonic Crystal Klystron Amplifier'. Together they form a unique fingerprint.

Cite this