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Tight focusing of partially coherent and radiallly polarized vortex beams
Partially coherent and radially polarized vortex beam Large numerical aperture and diffractive optical element Spatial coherence Interesting beam patterns
2013/7/2
We investigate the tight focusing properties of partially coherent and radially polarized vortex beams by use of vectorial Debye theory. It is found that the intensity profiles and the degree of coher...
Tight focusing of partially coherent and radiallly polarized vortex beams
Partially coherent and radially polarized vortex beam Large numerical aperture and diffractive optical element Spatial coherence Interesting beam patterns
2013/7/2
We investigate the tight focusing properties of partially coherent and radially polarized vortex beams by use of vectorial Debye theory. It is found that the intensity profiles and the degree of coher...
High focusing of radially polarized Bessel-modulated Gaussian beam
focusing properties Bessel-modulated Gaussian beam vector diffraction theory
2011/5/9
The focusing properties of radially polarized Bessel-modulated Gaussian (QBG) beam are
theoretically investigated in detail by vector diffraction theory. The QBG beam contains an optical
vortex. Cal...
Focusing of a femtosecond vortex light pulse through a high numerical aperture objective
Ultrafast phenomena Singular Optics Diffraction Theory
2013/7/2
We investigate the focusing properties of a femtosecond vortex light pulse focused by a high numerical aperture objective. By using the Richards-Wolf vectorial diffraction method...
Focusing of elliptically polarized Gaussian beams through an annular high numerical aperture
Debye theory high numerical aperture elliptically polarized focusing
2013/7/2
Based on the vectorial Debye theory, the focusing properties of the Gaussian beam through an annular high numerical aperture are studied numerically, including the intensity, the phase and the orbital...
Deep-Subwavelength Focusing and Steering of Light in an Aperiodic Metallic Waveguide Array
Deep-Subwavelength Focusing Light Aperiodic Metallic Waveguide Array
2015/8/10
We consider an aperiodic array of coupled metallic waveguides with varying subwavelength widths.For an incident plane wave, we numerically demonstrate that a focus of as small as one-hundredth of a wa...
Wave-vector space picture for radiationless focusing and beaming
Wave-vector space picture radiationless focusing beaming
2015/8/10
Radiationless interference of an electromagnetic wave occurs in the near field when the feature sizes of the waves are at the deep subwavelength scale. We present the propagation in such a regim...
Highly Focusing 1-kW All-Solid-State Laser
Solid-state-laser Diode pumped Frequency conversion
2009/6/12
We have developed an all-solid-state laser with high energy pulses and high brightness. In 2001 fiscal year, we produced the average output power of 1050 W with the beam-quality of about 8 times the d...
Tight focusing of spirally polarized vortex beams
Tightly focusing Spiral polarization Vortex beams
2013/7/2
he tight focusing of spirally polarized focused vortex beams is analyzed numerically based on the vectorial Debye theory. The expressions for the electric field and the orbital angular momentum of foc...
Enhancing or suppressing self-focusing in nonlinear photonic crystals
suppressing self-focusing nonlinear photonic crystals
2015/8/11
The authors show that the effect of self-focusing can be controlled by exploiting spatial dispersion effects in a photonic crystal. In the positive refraction region, the critical field value fo...