RESONANCES IN THE SMITH–PURCELL EFFECT

1964 ◽  
Vol 42 (6) ◽  
pp. 1195-1211 ◽  
Author(s):  
A. Hessel
Keyword(s):  
Millimeter Waves ◽  
Current Sheath ◽  
Rigorous Solution ◽  
Resonance Effects ◽  
Optical Reflection ◽  
Electromagnetic Resonance ◽  
Optical Grating ◽  
Surface Reactance ◽  
Grating Spectroscopy ◽  
Reflection Grating

A rigorous solution is derived for the problem of radiation of the Smith–Purcell type (Smith and Purcell 1953) extracted from a radio-frequency bunched electric-current sheath, above a plane exhibiting a periodically varying surface reactance. The plane is regarded as a model of an optical reflection grating. The solution indicates that the presence of the grating will give rise to electromagnetic resonance effects which are closely related to the so-called Wood anomalies (Wood 1935; Twersky 1956; Hessel 1960; Hessel and Oliner 1962; Stewart and Gallaway 1962), encountered in optical-grating spectroscopy. Utilization of these resonances may be advantageous in the generation of millimeter waves.

QUANTUM CONFINEMENT IN COATED NANOPARTICLES

1996 ◽  
Vol 03 (01) ◽  
pp. 133-136 ◽  
Author(s):  
H.S. ZHOU ◽  
I. HONMA ◽  
K.H. KIM ◽  
H. KOMIYAMA ◽  
H. SASABE ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Theoretical Approach ◽  
Quantum Confinement ◽  
Optical Absorption Spectra ◽  
Shell Layer ◽  
Resonance Effects ◽  
Coated Nanoparticles ◽  
Electromagnetic Resonance ◽  
Colloidal Method ◽  
Confinement Model

We synthesize CdS/PbS -coated nanoparticles and investigate the spectra of their optical absorption and photoluminescence (PL). The experimental results can be explained by the quantum-confinement model in coated semiconductor nanoparticles. We also prepare gold-coated nanoparticles with a nonmetallic core Au 2 S by a two-step colloidal method, and observe the extraordinary optical absorption spectra of the coated samples. The results are consistent with a theoretical approach that includes electromagnetic resonance effects and the quantum confinement of the carriers in the thin gold shell layer.

Leakage and Resonance Effects on Guiding Structures for Optical and Millimeter Waves

1977 ◽  
Author(s):  
S. T. Peng ◽  
A. A. Oliner
Keyword(s):  
Millimeter Waves ◽  
Resonance Effects

scholarly journals Low-voltage driven graphene-loaded metal wire grating device in total internal reflection geometry for broadband THz modulation

2021 ◽  
Vol 14 (2) ◽  
pp. 44-51
Author(s):  
Xudong Liu ◽  
Hao Chen ◽  
Teng Li ◽  
Yiwen Sun
Keyword(s):  
Phase Modulation ◽  
Total Internal Reflection ◽  
Communication Systems ◽  
Low Voltage ◽  
Internal Reflection ◽  
Metal Wire ◽  
Resonance Effects ◽  
Electromagnetic Resonance ◽  
Reflection Geometry ◽  
Wire Grating

Terahertz modulators with capability of both intensity and phase are essential for THz imaging and communication systems. The low-voltage driven THz modulation technique is crucial for integrating the modulators with electronics components. There is still a lack of broadband devices able to achieve both amplitude and phase modulation with low voltage, due to the underlying physics behind existing approaches. Here, we demonstrate a graphene-loaded metal wire grating THz modulator in the total internal reflection geometry to achieve intensity modulation of 80% and phase modulation of 70 degree within 3 volts gate voltage. Quite different from using the strategy of metamaterials based on the electromagnetic resonance effects, our design has performed a broadband modulation for over 1 THz bandwidth.

New electromagnetic resonance effects associated with cavity-backed apertures

Radio Science ◽  
1987 ◽  
Vol 22 (4) ◽  
pp. 449-454 ◽  
Author(s):  
Richard W. Ziolkowski
Keyword(s):  
Resonance Effects ◽  
Electromagnetic Resonance

scholarly journals Analytical alignment tolerances for off-plane reflection grating spectroscopy

2013 ◽  
Vol 36 (3) ◽  
pp. 661-677 ◽  
Author(s):  
Ryan Allured ◽  
Randall T. McEntaffer
Keyword(s):  
Grating Spectroscopy ◽  
Reflection Grating

The method of determining the metrological performance of unit reference standards of reflection coefficient in waveguides at millimeter waves

2020 ◽  
pp. 59-63
Author(s):  
A.S. Bondarenko ◽  
A.S. Borovkov ◽  
I.M. Malay ◽  
V.A. Semyonov
Keyword(s):  
Reflection Coefficient ◽  
Millimeter Waves ◽  
Primary Standard ◽  
Reference Standards ◽  
Measurement Scale ◽  
Current State ◽  
Coefficient Measurement ◽  
Mathematical Equations ◽  
Electrodynamic Modeling ◽  
Metrological Performance

The analysis of the current state of the reflection coefficient measurements in waveguides at millimeter waves is carried out. An approach for solving the problem of reproducing the reflection coefficient measurement scale is proposed. Mathematical equations, which are the basis of the reflection coefficient measurement equation are obtained. The method of determining the metrological performance of reflection coefficient unit’s reference standards is developed. The results of electrodynamic modeling and analytical calculations by the developed method are compared. It is shown that this method can be used for reproducing the reflection coefficient unit in the development of the State primary standard.

Resonance effects of wave-particle interactions during artificial charges particle beam injections in ionospheric plasma

2014 ◽  
Vol 20 (5(90)) ◽  
pp. 3-26 ◽  
Author(s):  
N. Baranets ◽  
◽  
Yu. Ruzhin ◽  
N. Erokhin ◽  
V. Afonin ◽  
...  
Keyword(s):  
Ionospheric Plasma ◽  
Particle Beam ◽  
Particle Interactions ◽  
Resonance Effects ◽  
Wave Particle Interactions

A Study on Reflectivity Evaluation Method of EM Wave Absorbers in Millimeter Waves

2005 ◽  
Vol 125 (4) ◽  
pp. 359-366
Author(s):  
Hiroshi Kurihara ◽  
Yoshihito Hirai ◽  
Toshifumi Saito ◽  
Koji Takizawa ◽  
Osamu Hashimoto
Keyword(s):  
Millimeter Waves ◽  
Evaluation Method

Generation of Millimeter Waves with Fine Frequency Tunability Using Mach-Zehnder-Modulator-Based Flat Comb Generator

2013 ◽  
Vol E96.C (2) ◽  
pp. 192-196 ◽  
Author(s):  
Isao MOROHASHI ◽  
Yoshihisa IRIMAJIRI ◽  
Takahide SAKAMOTO ◽  
Tetsuya KAWANISHI ◽  
Motoaki YASUI ◽  
...  
Keyword(s):  
Millimeter Waves ◽  
Frequency Tunability ◽  
Mach Zehnder Modulator
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