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Characterization of Anisotropic Leaky Mode Modulators for Holovideo

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Dynamic Spectral Modulation on Meta-Waveguides Utilizing Liquid Crystal.

Chengkun Dong¹, Ziwei Zhou¹, Xiaowen Gu^1,2

¹Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|October 23, 2023

Summary

This summary is machine-generated.

This study introduces dynamic spectral modulation using liquid crystal meta-waveguides, achieving a 16 dB switching ratio for integrated photonics. This innovation enables compact, low-energy optical devices with fast response times.

Keywords:

dynamic spectral modulation forward scattering integrated photonics meta-waveguides

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Area of Science:

Photonics
Metasurfaces
Integrated Optics

Background:

Metasurfaces and optical waveguides enable efficient light manipulation.
Existing devices are passive, lacking dynamic modulation capabilities.

Purpose of the Study:

To demonstrate dynamic on-chip spectral modulation using liquid crystal (LC) integrated with meta-waveguides.
To achieve voltage-controlled tuning of the optical spectrum for integrated photonic applications.

Main Methods:

Fabrication of meta-waveguides using electron beam lithography (EBL).
Integration with liquid crystals for voltage-tunable refractive index.
Experimental verification of spectral modulation and transmittance.

Main Results:

Achieved a switching ratio of approximately 16 dB at 1551.64 nm with a compact 8 µm × 0.4 µm active area.
Experimentally verified improved transmittance in the short wavelength, consistent with simulations.
Demonstrated a blue shift in the spectrum due to voltage-induced refractive index tuning of the LC.

Conclusions:

This work presents the first experimental verification of dynamic spectral modulation in meta-waveguides using liquid crystals.
The developed device offers a promising platform for on-chip dynamic modulation in integrated photonics.
Potential applications include optoelectronic computing architectures and novel wavelength selection switches with advantages in size, speed, and energy efficiency.