Hoehne, F.; Dreher, L.; Behrends, J.; Fehr, M.; Huebl, H.; Lips, K.; Schnegg, A.; Suckert, M.; Stutzmann, M.; Brandt, M.S.: Lock-in detection for pulsed electrically detected magnetic resonance. Review of Scientific Instruments 83 (2012), p. 043907/1-4
10.1063/1.4704837
Open Access Version (externer Anbieter)
Abstract:
We show that in pulsed electrically detected magnetic resonance (pEDMR) signal modulation in combination with a lock-in detection scheme can reduce the low-frequency noise level by one order of magnitude and in addition removes the microwave-induced non-resonant background. This is exemplarily demonstrated for spin-echo measurements in phosphorus-doped silicon. The modulation of the signal is achieved by cycling the phase of the projection pulse used in pEDMR for the readout of the spin state.