Shaping Of Fully Vectorial Light Beams Along Curves In Focal Fields And Their Applications

There are two kinds of modulation of optical in the classical optical field,including modulation is carried out in space domain and time domain.The former mainly contain information of monochromatic optic field such as amplitude,phase,and state of polarization(So P),and the latter contain frequency information of light field.Tailoring versatilely distribution of amplitude,phase and polarization of light has attracted extensive attention of researchers,due to its unique properties and novel applications in various scientific and engineering realms.The main issues addressed in this dissertation are as follows:A method,termed as fully vectorial curvilinear trajectories focal fields,for completely shaping optical vector beams with controllable amplitude,phase and polarization gradient along three-dimensional freestyle trajectories is proposed.we review the curvilinear focus field methods by predecessors,and extend this scheme to completely shaping of the curvilinear focus field,termed as extraordinary curvilinear focal fields,by prescribed import term of amplitude modulation.There is higher quality of focal field compared with other non-analytical solutions,owing to the strict mathematical solution of Fourier transform between the incident field and the focal field in our method.Compare with traditional Bessel beams,our method have a tighter intensity profile with a high transversal which will be appreciated to yield optical gradient forces for transportation of micro-sized particles,and it is flexible without losing the versatility of its structural design,owning to terse relation between incident plane and focal field.It should be noted that the radius of the curve with the distribution of amplitude and phase is controlled independently,resulting in the naturally shaping of kinds of arbitrary perfect helical beams.By exploiting our previously proposed method of extraordinary curvilinear trajectories focal fields and 4-f vector optical field generator,the So P of synthesized vector beam varies only along a equator circle or prime meridian circle on the Poincarésphere(PS),extend to can span the entire surface of the PS,that break through the limitations of the original single polarization gradient distribution and increase the diversity of the polarization gradient of curvilinear trajectories focal field.In the end of this dissertation,the feasibility and reliability of the proposed scheme is demonstrated experimentally by our scheme of curvilinear Poincare vector beams(CPVBS)...