研究目的
Development of a dynamically tunable OAM light source for the realization of OAM modulation and multiplexing.
研究成果
The tunable OAM microlaser is capable of emitting vortex beams of five different topological charges at room temperature, offering fundamentally new functionality of controllable vortex light emission in a scalable way. This development holds promise for future high-density data transmission in classical and quantum regimes.
研究不足
The study demonstrates the potential for high-capacity data transmission but may face challenges in practical integration due to the complexity of the setup and the need for precise control of the non-Hermitian interaction.
1：Experimental Design and Method Selection:
The study utilized a microring resonator on a III-V semiconductor platform with a 200-nm-thick InGaAsP multiple quantum well layer, coupled with an additional bus waveguide of InGaAsP with two control arms. This setup enabled the indirect coupling between two modes for non-Hermitian-controlled chiral light emission.
2：Sample Selection and Data Sources:
The microlaser cavity had a diameter of 7 mm and a width of 0.65 mm, supporting a whispering gallery mode (WGM) on the order of N = 34 and scatter number M = 32 for a total angular momentum of |J| =
3：65 mm, supporting a whispering gallery mode (WGM) on the order of N = 34 and scatter number M = 32 for a total angular momentum of |J| = List of Experimental Equipment and Materials:
2.
3. List of Experimental Equipment and Materials: A nanosecond laser was used for pumping the microlaser cavity and the control arms. The setup included a radial polarizer for converting circularly polarized light into a linearly polarized beam.
4：Experimental Procedures and Operational Workflow:
Two synchronized pump beams were projected: one onto the microlaser cavity for lasing and the other to selectively pump one of the control arms to manipulate the chirality of the lasing. The emitted beam was split into two identical beams for interferogram analysis.
5：Data Analysis Methods:
The self-interference interferograms were captured to analyze the vortex reconfiguration of the emitted beams, revealing the phase winding and confirming the OAM charge.
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