Frequency modulation of fluxon oscillations |
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| Institution: | 1. School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Jatni, 752050, India;2. Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden- Rossendorf, 01328, Dresden, Germany;1. Environment and Sustainability Institute (ESI), University of Exeter, Penryn Campus, Penryn, Cornwall, TR10 9FE, United Kingdom;2. National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar, Pakistan;3. Women University Swabi, Guloo Dehri, Swabi, Khyber Pakhtunkhwa, 23430, Pakistan;1. Department of Physics, N.M.S.S.V.N college, Madurai, Tamilnadu, 625019, India;2. Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Chennai, Tamilnadu, 603203, India;1. Department of Sociology, Gender and Social Work, Centre for Sustainability: Agriculture, Food, Energy, Environment (CSAFE), 280 Leith Walk, University of Otago, Dunedin 9010, New Zealand;2. Department of Community and Environmental Sociology, University of Wisconsin-Madison, 1450 Linden Drive, Madison, WI 53706, USA |
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| Abstract: | The effect of the application of an ac external electromagnetic field to a long Josephson junction is studied by analyzing the spectrum of the radiation emitted by the junction. In the absence of the external field the junction, biased on a dc current singularity of the current-voltage characteristic, emits radiation at a frequency ƒ0 in the X-band of the microwaves. The application of an external ac field having a frequency ƒm of the order of several megahertz gives rise to the appearance of spectral components at frequencies ƒ0±nƒm, with n integer. The experimental results are described reasonably well by classical FM modulation theory. |
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