Results 1 to 10 of about 14,072,553 (277)
Superlight inverse Doppler effect [PDF]
arXiv, 2018 There is a century-old tenet [1, 2] that the inverse Doppler frequency shift of light [3-13] is impossible in homogeneous systems with a positive refractive index. Here we break this long-held tenet by predicting a new kind of Doppler effect of light inside the Cherenkov cone.
Marin Soljacic +9 more
arxiv +11 more sources
Spatiotemporal Acoustic Communication by a Single Sensor via Rotational Doppler Effect. [PDF]
Adv Sci (Weinh), 2023 A longstanding pursuit in information communication is to increase transmission capacity and accuracy, with multiplexing technology playing as a promising solution.
Zhang C, Jiang X, He J, Li Y, Ta D.
europepmc +2 more sources
Acoustic topological beam nonreciprocity via the rotational Doppler effect. [PDF]
Sci Adv, 2022 Reciprocity is a fundamental principle of wave physics related to time-reversal symmetry. Nonreciprocal wave behaviors have been pursued for decades because of their great scientific significance and tremendous potential applications.
Wang Q +5 more
europepmc +2 more sources
Remote Measurement of the Angular Velocity Vector Based on Vectorial Doppler Effect Using Air-Core Optical Fiber. [PDF]
Research (Wash D C), 2022 Rotational Doppler effect has made tremendous development in both theoretical and applied research over the last decade. Different from the inertial thinking of focusing on the scalar field dominated by helical phase light, we have revealed a vectorial ...
Wan Z +7 more
europepmc +2 more sources
Doppler effect described by the solutions of the Cattaneo telegraph equation. [PDF]
Acta Mech, 2021 The Cattaneo telegraph equation for temperature with moving time-harmonic source is studied on the line and the half-line domain. The Laplace and Fourier transforms are used.
Povstenko Y, Ostoja-Starzewski M.
europepmc +2 more sources
The Doppler Effect and Carnet's Principle [PDF]
Nature, 1914 IN my letter of March 19 I endeavoured to show that the latent heat absorbed in the production of unit volume of stationary vibration of a particular frequency in a mixed beam of radiation, is not equal to 4q/c (where q is the energy stream per sq. cm.
Hugh Longbourne Callendar
openalex +5 more sources
Resonant Doppler effect in systems with variable delay. [PDF]
Philos Trans A Math Phys Eng Sci, 2019 We demonstrate that a time-varying delay in nonlinear systems leads to a rich variety of dynamical behaviour, which cannot be observed in systems with constant delay.
Müller-Bender D, Otto A, Radons G.
europepmc +2 more sources
Observation of the Zero Doppler Effect. [PDF]
Sci Rep, 2016 AbstractThe normal Doppler effect has well-established applications in many areas of science and technology. Recently, a few experimental demonstrations of the inverse Doppler effect have begun to appear in negative-index metamaterials. Here we report an experimental observation of the zero Doppler effect, that is, no frequency shift irrespective of ...
Ran J +5 more
europepmc +6 more sources
Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect. [PDF]
Light Sci Appl, 2017 The ability to measure the orbital angular momentum (OAM) distribution of vortex light is essential for OAM applications. Although there have been many studies on the measurement of OAM modes, it is difficult to quantitatively and instantaneously measure
Zhou HL +7 more
europepmc +2 more sources
Cascaded rotational Doppler effect [PDF]
Optics Letters, 2019 We propose and substantiate experimentally the cascaded rotational Doppler effect for interactions of spinning objects with light carrying angular momentum. Based on the law of parity conservation for electromagnetic interactions, we reveal that the frequency shift can be doubled through cascading two rotational Doppler processes which are mirror ...
Wei Liu +3 more
openaire +6 more sources