Numerical and experimental analysis of Bessel beam properties based on continuous-wave terahertz radiation

2018 ◽  
Author(s):  
Zhihao Xu ◽  
Lu Rong ◽  
Dayong Wang ◽  
Bin Li ◽  
Jie Zhao ◽  
...  
Keyword(s):  
Terahertz Radiation ◽  
Experimental Analysis ◽  
Continuous Wave ◽  
Bessel Beam

Multi-channel homodyne detection of continuous-wave terahertz radiation

2005 ◽  
Vol 87 (3) ◽  
pp. 034106 ◽  
Author(s):  
I. S. Gregory ◽  
W. R. Tribe ◽  
M. J. Evans ◽  
T. D. Drysdale ◽  
D. R. S. Cumming ◽  
...  
Keyword(s):  
Terahertz Radiation ◽  
Continuous Wave ◽  
Homodyne Detection

Field Computation for Two-Dimensional Array Transducers with Limited Diffraction Array Beams

2005 ◽  
Vol 27 (4) ◽  
pp. 237-255 ◽  
Author(s):  
Jian-Yu Lu ◽  
Jiqi Cheng
Keyword(s):  
Continuous Wave ◽  
Weighting Function ◽  
Near Field ◽  
Bessel Beam ◽  
Two Dimensional ◽  
Axially Symmetric ◽  
Computationally Efficient ◽  
Annular Array ◽  
Array Transducer ◽  
Analytical Expressions

A method is developed for calculating fields produced with a two-dimensional (2D) array transducer. This method decomposes an arbitrary 2D aperture weighting function into a set of limited diffraction array beams. Using the analytical expressions of limited diffraction beams, arbitrary continuous wave (cw) or pulse wave (pw) fields of 2D arrays can be obtained with a simple superposition of these beams. In addition, this method can be simplified and applied to a 1D array transducer of a finite or infinite elevation height. For beams produced with axially symmetric aperture weighting functions, this method can be reduced to the Fourier-Bessel method studied previously where an annular array transducer can be used. The advantage of the method is that it is accurate and computationally efficient, especially in regions that are not far from the surface of the transducer (near field), where it is important for medical imaging. Both computer simulations and a synthetic array experiment are carried out to verify the method. Results (Bessel beam, focused Gaussian beam, X wave and asymmetric array beams) show that the method is accurate as compared to that using the Rayleigh-Sommerfeld diffraction formula and agrees well with the experiment.

Large-area microstructured photomixer as scannable detector of continuous-wave terahertz radiation

2012 ◽  
Vol 29 (12) ◽  
pp. 3254 ◽  
Author(s):  
Armaghan Eshaghi ◽  
Mahmoud Shahabadi ◽  
Lukas Chrostowski ◽  
Saeid Kamal
Keyword(s):  
Terahertz Radiation ◽  
Continuous Wave ◽  
Large Area

scholarly journals Continuous wave terahertz radiation from an InAs/GaAs quantum-dot photomixer device

2012 ◽  
Vol 101 (8) ◽  
pp. 081114 ◽  
Author(s):  
T. Kruczek ◽  
R. Leyman ◽  
D. Carnegie ◽  
N. Bazieva ◽  
G. Erbert ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Terahertz Radiation ◽  
Continuous Wave ◽  
Gaas Quantum Dot

Generation of Terahertz Radiation by Optical Rectification Using Femtosecond Bessel Beam

2017 ◽  
Vol 23 (4) ◽  
pp. 1-6 ◽  
Author(s):  
Shuaishuai Xu ◽  
Yanfeng Li ◽  
Xiaojing Liang ◽  
Hui Cao ◽  
Minglie Hu ◽  
...  
Keyword(s):  
Terahertz Radiation ◽  
Bessel Beam ◽  
Optical Rectification
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