Guozhen Liang

High-purity linearly polarized emission from a compact BIC laser

Yifan Li, Wei Guo, Zihang Cui, Guozhen Liang et autres

Bound states in the continuum (BICs) confer ultrahigh quality factors and, thus, enable low thresholds upon photonic crystal (PhC) lasers. However, BICs feature a momentum-space vectorial polarization vortex, posing a substantial obstacle in achieving high-purity polarized emission. Traditionally, polarization control of a …

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Dirac‐Scaled Topological Edge States for High‐Performance Surface Emission

Xing Hong, Zihang Cui, Y Li, Wei Guo et autres

ABSTRACT Topological edge‐state lasers, benefiting from the backscattering immunity and robustness of topologically protected edge modes, hold great promise for applications including large‐scale integration, surface emission, and vortex beam generation. However, their optical modes are tightly confined along the topological interface, offering …

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Tailoring 3D propagation-invariant light via generalized non-annular angular spectrum distributions

Zhen Li (49109), Lin Wu, Mian Wu, Chao Yang et autres

For propagation-invariant optical fields along a fixed axis, equal longitudinal wavevectors fundamentally dictate an annular angular spectrum. While this physical constraint inherently restricts the design of optical fields, we present a generalized theoretical framework that expands this regime. By deriving the rigorous …

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Topological nanorainbow laser

Shouqi Zhang, Yongquan Zeng, Xing Hong, Wen Dong Zhao et autres

Multiwavelength (or multifrequency) coherent light sources with spatial isolation are essential for diverse applications. Nevertheless, regulating the multiple emission wavelengths in an ultracompact scale is challenging. In this work, we realize a topological nanorainbow laser by exploiting synthetic dimensions in parameter space …

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Omnidirectional Angular‐Multiplexed Meta‐Holography via Arbitrary Spatial Rays

Chao Xu, Yangyang Shi, Shuai Wan, Zirui Zhao et autres

Abstract Metasurfaces exhibit exceptional light manipulation capabilities, with extensive exploration and utilization of various optical parameters, including wavelength, intensity, polarization, orbital angular momentum, etc, enabling novel degrees of freedom (DoF) for optical multiplexing. Serving as an essential optical parameter, the DoF for …

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Photonic Disclination Nanocavities with Versatile Rotational Symmetries

Zihang Cui, Wei Jie Guo, Xing Hong, Jin Tao et autres

Disclinations, as real-space topological defects, have been extensively studied across condensed matter and classical wave systems. However, their formation is typically restricted by atomic interaction forces or specific lattice symmetries, severely limiting the tunability. Here, we engineer photonic disclination nanocavities with versatile …

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Robust, efficient, micrometre-scale phase modulators at visible wavelengths

Guozhen Liang, Heqing Huang, Aseema Mohanty, Min Chul Shin et autres

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The design of crossover based on microstrip ridge gap waveguide of dual-layer medium

Chanqing Xu, Permanand Soothar, Shuanglong Quan, Guozhen Liang et autres

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Micron-scale, efficient, and robust phase modulators at visible wavelengths

Nanfang Yu, Guozhen Liang, Heqing Huang, Aseema Mohanty et autres

Optical phase modulators are essential to large-scale integrated photonic systems at visible wavelengths, promising for many emerging applications. However, current technologies require large device footprints and either high power consumption or high drive voltage, limiting the number of active elements in a …

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Plasmonic Metasensors Based on 2D Hybrid Atomically Thin Perovskite Nanomaterials

Shuwen Zeng, Guozhen Liang, Alexandre Gheno, Sylvain Vedraine et autres

In this work, we have designed highly sensitive plasmonic metasensors based on atomically thin perovskite nanomaterials with a detection limit up to 10−10 refractive index units (RIU) for the target sample solutions. More importantly, we have improved phase singularity detection with the …

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Robust Miniature Pure-Phase Modulators at k = 488 nm

Heqing Huang, Guozhen Liang, Aseema Mohanty, Xingchen Ji et autres

We demonstrate miniature silicon nitride (SiN) pure-phase modulators operating at the blue wavelength. The devices are based on adiabatic micro-rings that are robust against fabrication variations and hold great promise for large-scale visible integrated systems.

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Micron-Scale. Efficient, Robust Phase Modulators in the Visible

Guozhen Liang, Heqing Huang, Sajan Shrestha, Aseema Mohanty et autres

We demonstrate miniature silicon nitride (SiN)pure phase modulators in the visible that are robust to fabrication variations. They offer a one-order-of-magnitude reduction in device footprint and power consumption compared to SiN waveguide phase shifters. © 2019 The Author(s)

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