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Reconfigurable multi-state photonic encryption
Chenxingyu Huang, Qian Li, Hongyan Fu
Published Published online: 20 July 2026 , doi: 10.37188/lam.2026.085
A bias-switchable van der Waals phototransistor demonstrates reconfigurable transitions between photovoltaic and photoconductive modes, generating four current states within a single device. This multi-state functionality advances on-chip optical logic and image encryption. It offers a promising route towards secure, low-power, and highly integrated photonic communication systems.
Application of suspended waveguide to enable ppb-level on-chip photonic gas sensing
William W. Yu
Published Published online: 27 April 2026 , doi: 10.37188/lam.2026.061
A recent study reported a suspended chalcogenide waveguide platform that enables ppb-level molecular gas sensing on a centimetre-scale photonic chip using near-infrared photothermal spectroscopy. These results highlight the use of suspended waveguides as a promising approach to achieving ultra-sensitive, fully integrated optical gas sensors by jointly engineering light–matter interaction and on-chip thermal management.
Widely tunable on-chip green light generation
Yu Xia, Chao Xiang
Published Published online: 10 June 2026 , doi: 10.37188/lam.2026.081
A widely tunable on-chip green light source in a silicon nitride (SiN) microresonator is demonstrated. By inscribing an effective \begin{document}$ \chi^{(2)} $\end{document} grating in the microresonator via all-optical poling (AOP), green light is generated through second-harmonic generation (SHG). Comb-assisted sum-frequency generation (SFG) is also realised using a coherent Kerr comb arising from the intrinsic \begin{document}$ \chi^{(3)} $\end{document} nonlinearity around the pump wavelength. The combination of these two mechanisms provides fine tunability across the green spectrum. Furthermore, the SFG process introduces a new tuning paradigm, enabling the green output wavelength to be switched over a broad range. These results extend the spectral accessibility of integrated photonics and highlight new opportunities for on-chip light sources.
Beyond desalination: solar-thermal interfaces for mineral mining
Ahmed Mortuza Saleque, Murali Gedda, Qiaoqiang Gan
Published Published online: 10 June 2026 , doi: 10.37188/lam.2026.058
Solar-thermal interfacial evaporation provides an energy-efficient solution for decentralised desalination. However, its practical application with real seawater is hindered by salt accumulation and brine discharge. In a recent study, a laser-nanostructured, superwicking metallic interface that fundamentally decouples evaporation from crystallization was demonstrated. By using directional capillary transport to direct mineral growth away from the photothermal active zone, this platform enables stable, high-flux desalination of raw ocean water while allowing for nearly complete salt harvesting. This work marks a pivotal shift toward zero-liquid-discharge systems, redefining seawater as both a water source and harvestable reservoir for the circular mineral economy.
Single observation for light-field editing
Qiong-Hua Wang
Published Published online: 09 June 2026 , doi: 10.37188/lam.2026.057
Inferring explicit illumination cues from a single sparse observation fundamentally decouples scene representation from its captured environment. By shifting illumination from a static, baked-in attribute to a parametrically editable representation, the framework establishes a novel paradigm for scalable, photometrically consistent immersive displays under dynamic real-world conditions.
Minimalist optical achromatic meta-imaging with extended field of view
Boping He, Shuming Wang, You Zhou
Published Published online: 14 May 2026 , doi: 10.37188/lam.2026.065
A minimalist optical system based on a monolithic integrated meta-axicon cluster achieves achromatic imaging over an extended field of view without relying on conventional dispersion engineering. By harnessing the inherent broadband consistency of Bessel beams and combining it with non-blind image restoration, the design circumvents the strict phase-matching constraints that have traditionally limited large-aperture meta-optics. This work establishes a promising paradigm for combining physics-driven optical elements with computational reconstruction, paving the way toward scalable, high-performance meta-imaging systems.
Metasurface generates singlet oxygen on demand
Yunqi Zhang, Chao He
Published Published online: 26 May 2026 , doi: 10.37188/lam.2026.072
Although singlet oxygen is central to photodynamic therapy and photocatalysis, rapid and spatially precise generation has remained challenging. A quasi-BIC Au–TiO2 metasurface couples critical optical absorption to interfacial hot-carrier transfer, enabling molar-level local singlet oxygen production within seconds and wavelength-selective, pixel-resolved cytotoxicity without molecular sensitizers.
A 1-MHz VCSEL for compact atomic clocks
Zhou Xin, Yukang Chen, Du Xiang
Published Published online: 30 April 2026 , doi: 10.37188/lam.2026.047
A 2026 study introduced a transformative design for vertical-cavity surface-emitting lasers (VCSELs), achieving a dramatic narrowing of the intrinsic linewidth to approximately 1 MHz without relying on external optical feedback. This performance is enabled by the monolithic integration of a precisely engineered passive cavity that strategically tailors photon lifetime while suppressing mode competition. The resulting architecture delivers an ultra-compact, scalable, and inherently stable coherent light source, representing a significant advance for chip-scale atomic clocks and quantum sensing technologies.
Multifunctional single-fiber integration enables closed-loop tumour photothermal therapy
Xiaoyan Guo, Lijun Xu, Jingjing Guo
Published Published online: 29 April 2026 , doi: 10.37188/lam.2026.055
Interventional photothermal therapy in oncology requires accurate tumour targeting, controlled thermal dosing, and timely feedback. Optical fibres offer a compact route for light delivery; however, most fibre-based approaches remain functionally fragmented. A recent study reports a multifunctional single-fibre probe that integrates tumour identification, photothermal therapy, and real-time feedback through wavelength-division strategies, representing an important step toward closed-loop tumour photothermal therapy.
Subpixel-free full-colour reflective displays via sub-1 V redox modulation
Jinsung Mok, Dagam Kim, Dae-Hyeong Kim
Published Published online: 12 May 2026 , doi: 10.37188/lam.2026.044
A vibrant, full-colour monopixel reflective display has been developed using a conductive polymer integrated within a Gires-Tournois resonator. By embedding the electrochromic medium inside a phase-engineered cavity, the platform enables sub-volt operation while substantially broadening the colour-tuning range within a single pixel. This architecture reconciles colour versatility with energy-efficient operation and scalability towards micrometre-scale reflective microdisplays.
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