Electric-field induced phase modulation of quantum-well exciton polaritons in a guided-wave structure

1992 ◽  
Vol 53 (1-6) ◽  
pp. 391-394 ◽  
Author(s):  
Kensuke Ogawa ◽  
Toshio Katsuyama
Keyword(s):  
Electric Field ◽  
Quantum Well ◽  
Phase Modulation ◽  
Wave Structure ◽  
Guided Wave ◽  
Exciton Polaritons

NONLINEAR OPTICAL ABSORPTION BY INTERACTION BETWEEN INTERBAND- AND INTRABAND-RESONANT LIGHTS IN n-DOPED QUANTUM WELL STRUCTURE

1992 ◽  
Vol 01 (04) ◽  
pp. 673-681 ◽  
Author(s):  
SUSUMU NODA ◽  
TETSURO OKUDA ◽  
TAKAO YAMASHITA ◽  
AKIO SASAKI
Keyword(s):  
Optical Absorption ◽  
Quantum Well ◽  
Nonlinear Optical ◽  
Wave Structure ◽  
Guided Wave ◽  
Third Order ◽  
Order Interaction ◽  
The Third ◽  
Quantum Well Structure ◽  
Nonlinear Optical Absorption

Nonlinear optical absorption for interband-resonant light by intraband-resonant light in n-doped quantum well structure is experimentally demonstrated. The nonlinearity is caused by the third-order interaction between interband- and intraband-resonant lights through a guided-wave structure. The amount of absorption for interband-resonant light is increased by 60% with the incidence of intraband-resonant light of 100–200 kW/cm2.

Phase modulation of mid-infrared radiation in double-quantum-well structures under a lateral electric field

2017 ◽  
Vol 51 (3) ◽  
pp. 363-366 ◽  
Author(s):  
R. M. Balagula ◽  
M. Ya. Vinnichenko ◽  
I. S. Makhov ◽  
A. N. Sofronov ◽  
D. A. Firsov ◽  
...  
Keyword(s):  
Electric Field ◽  
Quantum Well ◽  
Infrared Radiation ◽  
Phase Modulation ◽  
Double Quantum ◽  
Mid Infrared ◽  
Quantum Well Structures ◽  
Lateral Electric Field ◽  
Double Quantum Well

scholarly journals Observation of a comb-shaped filamentary plasma array under subcritical condition in 303-GHz millimetre-wave air discharge

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Masafumi Fukunari ◽  
Shunsuke Tanaka ◽  
Ryuji Shinbayashi ◽  
Yuusuke Yamaguchi ◽  
Yoshinori Tatematsu ◽  
...  
Keyword(s):  
Electric Field ◽  
Focal Point ◽  
Incident Beam ◽  
Wave Structure ◽  
Field Vector ◽  
Interesting Phenomenon ◽  
Millimetre Wave ◽  
Field Plane ◽  
Subcritical Condition ◽  
Air Discharge

AbstractGas breakdown in the millimetre-wave frequency band is an interesting phenomenon in nonlinear dynamics such as self-organized structure formation. We observed the transition between two types of filamentary plasma arrays in air discharge driven by a 303-GHz millimetre wave. Plasma is ignited at a parabolic mirror’s focal point in the overcritical condition. One array parallel to the electric field vector appears with a spacing of λ/4 at the focal point. Filaments then separate into plasma lumps ~10 μs after ignition. At 20 μs, a new comb-shaped array grows in the subcritical condition. Filaments are parallel to the incident beam with spacing of 0.96 λ and elongate towards the incident beam. This comb-shaped array appears only in the electric field plane; bulk plasma with a sharp vertex forms in the magnetic field plane. This array is created by a standing wave structure generated by waves diffracted from the plasma surface. Filamentary plasma array formations can influence the energy absorption by the plasma, which is important for engineering applications such as beamed energy propulsion.

Guided Wave Focusing Mechanics in Pipe

2003 ◽  
Author(s):  
Takahiro Hayashi ◽  
Koichiro Kawashima ◽  
Zongqi Sun ◽  
Joseph L. Rose
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Guided Waves ◽  
Wave Structure ◽  
Guided Wave ◽  
Pipe Inspection ◽  
Specific Point ◽  
Wave Focusing ◽  
Beam Focusing ◽  
Subsequent Time

Guided waves can be used in pipe inspection over long distances. Presented in this paper is a beam focusing technique to improve the S/N ratio of the reflection from a tiny defect. Focusing is accomplished by using non-axisymmetric waveforms and subsequent time delayed superposition at a specific point in a pipe. A semi-analytical finite element method is used to present wave structure in the pipe. Focusing potential is also studied with various modes and frequencies.

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