Journal of Vacuum Science & Technology B, Vol.23, No.2, 840-842, 2005
Smith-Purcell radiation using a single-tip field emitter
We have successfully observed Smith-Purcell radiation (SPR) using a single-tip n-type Si field emitter in the visible wavelength from 400 to 700 nm at low input power level with beam currents of 20-200 nA and accelerating voltages of 25-30 kV. Several peaks corresponding to the third and fourth harmonics of SPR are obtained using a 550 nm period metal grating and redshifted with decrease of the acceleration voltage. The measured peaks are well explained by the SPR theory. (c) 2005 American Vacuum Society.