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2026

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06

Coherent Microwave-to-Optical Polarization Conversion Based on Holographic Quantum Sensing

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The team of Changshun Wang at Shanghai Jiao Tong University has proposed an atom‑based holographic quantum sensing technique that establishes a one‑to‑one correspondence between microwave fields and the polarization states of light. By exploiting photoinduced circular dichroism and birefringence in a four‑level atomic system excited by holographic polarization patterns, the authors have constructed a vectorial atomic hologram. Their study demonstrates that the polarization state of the reconstructed holographic diffraction field depends on the polarization state of the incident microwave, a relationship analyzed using Jones formalism and density matrix methods. Furthermore, experimental results confirm broadband microwave‑to‑optical polarization conversion—preserving phase information—at microwave frequencies of 31.467 GHz and 2.925 GHz, with a maximum polarization conversion efficiency of 10.42%. This work offers an effective strategy for coherent polarization‑information transmission across different frequency bands.

The research findings were published in ACS Photonics on April 16, 2026, under the title “Coherent Microwave-To-Optical Polarization Conversion via Holographic Quantum Sensing.”

Figure 1: Principle of atomic-based holographic quantum sensing

Figure 2: Schematic diagram of microwave-to-optical polarization conversion.

Figure 3: Nonlinear Polarization Spectroscopy

Figure 4: Experimental evidence for VAH formation

Figure 5: Experimental verification of microwave-to-optical polarization conversion

Figure 6: Preservation of Phase Information During the Conversion Process

Source: Optics World

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