公开(公告)号：US20180287329A1

公开(公告)日：2018-10-04

申请号：US15944360

申请日：2018-04-03

Applicant: Massachusetts Institute of Technology

Inventor： Yi YANG ,  Aviram MASSUDA ,  Charles ROQUES-CARMES ,  Nicholas H. RIVERA ,  Tena DUBCEK ,  John D. JOANNOPOULOS ,  Karl Kimon BERGGREN ,  Ido E. KAMINER ,  Marin SOLJACIC ,  Yujia YANG ,  Steven E. KOOI ,  Phillip Donald Keathley

IPC: H01S3/09 ,  H01S3/101

Abstract: An apparatus for generating Smith-Purcell radiation having at least one spectral component at a wavelength A includes a periodic structure including a dielectric material and an electron source, in electromagnetic communication with the periodic structure, to emit an electron beam propagating within about 5λ from a surface of the periodic structure to induce emission of the Smith-Purcell radiation. The electron beam has an electron energy tunable between about 0.5 keV and about 40 keV so as to change a wavelength of the Smith-Purcell radiation.