研究目的
Investigating the programmable manipulation of light, both in space and time, via the spectral management of the photon orbital angular momentum.
研究成果
The programmable manipulation of light via the spectral management of the photon orbital angular momentum provides a large set of prospective applications, from continuous light waves to ultrashort optical pulses. The approach can be adapted to any wavelength range and is likely to impact many research areas such as optical information, imaging, quantum optical communications, optical manipulation, or high-energy physics.
研究不足
The quality of the geometric phase shaping is limited by the finite size of the pixel and the ratio pixel size/defect core size. The efficiency of the process also depends on unwanted Fresnel reflections of the substrates. The speed of the device is limited to the kHz frequency for thin pixel thickness using conventional nematics.
1：Experimental Design and Method Selection:
The study utilizes a programmable liquid crystal spatial light modulator (LC-SLM) with electrically controllable 'topological pixels' for independent orbital angular momentum state control on multiple spectral channels.
2：Sample Selection and Data Sources:
The device is prepared by sandwiching a thin film of nematic LC with negative dielectric anisotropy between two transparent and conductive indium-tin-oxide coated glass slabs.
3：List of Experimental Equipment and Materials:
The sample used has a thickness of ?13 μm and is made of the nematic liquid crystal mixture MLC-6608 (Merck) and another sample with a thickness of ?7 μm made of the nematic liquid crystal mixture DFLNC (Beam Co).
4：Experimental Procedures and Operational Workflow:
The LC-SLM is used to demonstrate ultrabroadband scalar and vectorial vortex beam shaping and on-demand polychromatic superposition of orbital angular momentum states.
5：Data Analysis Methods:
The results are analyzed through interferometric analysis and far-field intensity profiles.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
