6533b870fe1ef96bd12cfc82
RESEARCH PRODUCT
Scaling the abruptly autofocusing beams in the direct-space
François CourvoisierMinglie HuChen XieZhenyu ZhaoYuquan ZhangDandan NiYanfeng Lisubject
Physics[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]Scale (ratio)business.industryParaxial approximationHolographyPhase (waves)01 natural sciencesAtomic and Molecular Physics and Opticslaw.invention010309 opticsAmplitude modulationTransformation (function)Opticslaw0103 physical sciencesLight beam010306 general physicsbusinessScalingdescription
International audience; We propose a simple technique to scale the abruptly autofocusing beams in the direct space by introducing a scaling factor in the phase. Analytical formulas are deduced based on optical caustics, explicitly revealing how the scaling factor controls location, peak intensity, and size of the focal spot. We demonstrate that the multiplication of a scaling factor on the phase is equivalent to the axial-scaling transformation under the paraxial approximation. Further numerical and experimental results confirm theoretical predictions. In addition, amplitude modulation using phase-only holograms is used to maintain the peak intensity level of the focal spots.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-01 |