用于高对比度显微镜的元格集成激光发射的高角度偏移
Mindaugas Juodėnas1, Erik Strandberg2, Alexander Grabowski2
1Department of Physics, Chalmers University of Technology, 412 96, Gothenburg, Sweden. mindaugas.juodenas@chalmers.se.
Light, science & applications
|October 13, 2023
概括
研究人员在激光器上开发了曲的元格线,用于紧显微镜照明. 这一创新使高效,可切换的暗场和全内部反射成像能够用于先进的生物光子应用.
科学领域:
- 光学和光子学 在光学和光子学.
- 生物光子学 生物光子学
- 材料科学 材料科学 材料科学
背景情况:
- 超光学为生物光子学提供了小型化潜力.
- 显微镜的高效广角光成型与元表面具有挑战性.
- 集成元光学与芯片上的光源对于紧型设备至关重要.
研究的目的:
- 为了展示与垂直腔表面发射激光器 (VCSELs) 集成的曲线GaAs元层.
- 为了启用芯片内照明,用于完全内部反射 (TIR) 和暗场显微镜.
- 为了克服单立体整合的挑战,实现高效的广角光操纵.
主要方法:
- 制造与VCSELs单体集成的弧形GaAs元基层.
- 使用一种非常规的设计来规避视角比例依赖的蚀刻问题.
- 轴外发射角度和相对偏移效率的表征.
主要成果:
- 在空气中60°,玻璃中63°实现了离轴发射.
- 证明了较高的相对屈曲效率 (>90%在空气中,>70%在玻璃中).
- 展示了使用组合metagrating-VCSELs在暗场和TIR照明之间快速切换.
结论:
- 集成的VCSELs提供了一种多功能,高对比度的成像照明解决方案.
- 这种方法与传统显微镜兼容,并与生物光子设备集成.
- 能够实现便携式显微镜,NIR-II生物成像和芯片上的实验室系统等应用.
相关概念视频
Confocal Fluorescence Microscopy
13.4K
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
13.4K
Super-resolution Fluorescence Microscopy
7.0K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
7.0K
Phase Contrast and Differential Interference Contrast Microscopy
8.2K
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
8.2K


