The Smith-Purcell radiation occurs when electrons move above a metallic diffraction grating. Its mechanism can be explained by the radiation of a moving oscillating dipole. Based on this, increasing the number of the dipole oscillations will be an effective way to enhance Smith-Purcell radiation. ...
In this work, the terahertz (THz) Smith-Purcell radiations (SPRs) for the relativistic electron bunch passing over an indium antimonide (InSb)-based substrate with a subwavelength grating under various temperatures of substrate are investigated by FDTD simulations and theoretical analyses. The explored...
& Smith, D. R. Enhanced optical bistability with film-coupled plasmonic nanocubes. Appl. Phys. Lett. 104, 063108 (2014). Article ADS CAS Google Scholar Akselrod, G. M. et al. Probing the mechanisms of large Purcell enhancement in plasmonic nanoantennas. Nat. Photonics 8, 835 (2014). ...
ice during the MH (Fig.2e, f). At this point, we argue that the early summer solar insolation in boreal high latitudes acted to enhance the ESAS sea ice decline by increasing the runoff of warmer waters via pan-Arctic rivers along with the direct thermal impact of radiation during the ...
2. Purcell, E. M. Spontaneous emission probabilities at radio frequencies. Phys. Rev. 69, 681 (1946). 3. Jaynes, E. E. & Cummings, F. W. Comparison of quantum and semiclassical radiation theories with application to the beam maser. Proc. of the IEEE 51, 89–109 (1963). 4. ...
Surface‐polariton enhanced Smith‐Purcell radiation from doped semiconductorsdoi:10.1063/1.37354N. E. GlassAmerican Institute of Physics
The phenomenon of free electrons crossing the periodic structure surface to stimulate radiation is called Smith-Purcell (SP) effect. Former researchers have discovered that by using the open resonator array, SP radiation can have a specific frequency and angle. What's more, this frequency is ...
RADIATIONMICROWAVESIMPEDANCE matchingREFLECTANCEDESIGN techniquesCOPLANAR waveguidesWe experimentally demonstrate a Purcell effect-based design technique for improved impedance matching, and thus enhanced the reflection coefficient from a small microwave emitter. Using an iterative process centred on comparing the ...
Similar to the numerical simulation, our time-resolved photoluminescence (TRPL) measurement indicates an experimental Purcell factor of ~3.11 for ensemble QDs on the PC surface compared to glass. Shown as Fig.3c, the averaged decay time ofτglass = 5.32 ns (±0.24 ns) while theτ...
Understanding the Purcell factor through the enhancement of radiation from an arbitrary electric dipole (with a fixed dipole moment) by a resonant environment was recently introduced in Refs. [26–28], where the equiva- lence of this definition of the Purcell factor to the classical definition (...