scholarly journals Angle- and polarization-independent mid-infrared narrowband optical filters using dense arrays of resonant cavities

2019 ◽  
Vol 27 (26) ◽  
pp. 37481 ◽  
Author(s):  
Ivan Avrutsky ◽  
Evan M. Smith ◽  
Shivashankar Vangala ◽  
Ricky Gibson ◽  
Joshua R. Hendrickson ◽  
...  
Keyword(s):  
Optical Filters ◽  
Resonant Cavities ◽  
Mid Infrared ◽  
Dense Arrays ◽  
Polarization Independent

Polarization-independent broadband achromatic metalens in the mid-infrared (3-5 μm) region

2021 ◽  
Author(s):  
Wenhui Xiong ◽  
Chenchen Sha ◽  
Jianping Ding
Keyword(s):  
Numerical Simulation ◽  
Infrared Imaging ◽  
Chromatic Aberration ◽  
Infrared Region ◽  
Mid Infrared ◽  
Light Manipulation ◽  
Wavefront Shaping ◽  
Polarization Independent

Abstract With superior capabilities for light manipulation and wavefront shaping, the metasurface recently has caught growing attention. However, the presence of chromatic aberration hinders metasurfaces, especially metalenses, from wider applications. Here, we design a polarization-independent broadband achromatic focusing metalens in the mid-infrared region, which covers continuous bands in 3-5 μm. Numerical simulation shows that different wavelengths can be focused to the same plane with a nearly diffraction-limited resolution, and can achieve an average focusing efficiency of nearly 70% in the whole bandwidth. We expect that our approach can underpin the development of integrated and mid-infrared imaging and detection.

3-micron wave band mid-infrared polarization-independent graphene modulator

2021 ◽  
Vol 136 (8) ◽  
Author(s):  
Rongguo Lu ◽  
Liming Shen ◽  
Yujiao Wang ◽  
Songwei Cai ◽  
Rui Lin ◽  
...  
Keyword(s):  
Wave Band ◽  
Mid Infrared ◽  
Polarization Independent

Extraordinary Coherent Thermal Emission From SiC Due to Coupled Resonant Cavities

2008 ◽  
Vol 130 (11) ◽  
Author(s):  
Nir Dahan ◽  
Avi Niv ◽  
Gabriel Biener ◽  
Yuri Gorodetski ◽  
Vladimir Kleiner ◽  
...  
Keyword(s):  
Quality Factor ◽  
Coherence Length ◽  
Thermal Emission ◽  
Spatial Coherence ◽  
Optical Filters ◽  
High Quality Factor ◽  
Experimental Results ◽  
Thermal Source ◽  
High Quality ◽  
Resonant Cavities

In high temperature and vacuum applications, when heat transfer is predominantly by radiation, the material’s surface texture is of substantial importance. Several micro- and nanostructure designs have been proposed to enhance a material’s emissivity and its radiative coherence, as control of thermal emission is of crucial concern in the design of infrared sources, optical filters, and sensing devices. In this research, an extraordinary coherent thermal emission from an anisotropic microstructure is experimentally and theoretically presented. The enhanced coherency is due to coherent coupling between resonant cavities obtained by surface standing waves, wherein each cavity supports a localized field that is attributed to coupled surface phonon polaritons. We show that it is possible to obtain a polarized quasimonochromatic thermal source from a SiC microstructure with a high quality factor of 600 at the resonant frequency of the cavity and a spatial coherence length of 716 wavelengths, which corresponds to an angular divergence of 1.4mrad. In the experimental results, we measured a quality factor of 200 and a spatial coherence length of 143 wavelengths. We attribute the deviation in the experimental results to imperfections in the fabrication of the high quality factor cavities.

Polarization-independent narrow-band optical filters with suspended subwavelength silica grating in the infrared region

Optik ◽  
2016 ◽  
Vol 127 (2) ◽  
pp. 955-958 ◽  
Author(s):  
Xu Lin-Hua ◽  
Zheng Gai-Ge ◽  
Zhao De-Lin ◽  
Chen Yun-Yun ◽  
Cao Kun
Keyword(s):  
Narrow Band ◽  
Optical Filters ◽  
Infrared Region ◽  
Polarization Independent

Bragg gratings on InGaAsP/InP waveguides as polarization independent optical filters

1989 ◽  
Vol 7 (11) ◽  
pp. 1641-1645 ◽  
Author(s):  
C. Cremer ◽  
G. Heise ◽  
R. Marz ◽  
M. Schienle ◽  
G. Schulte-Roth ◽  
...  
Keyword(s):  
Optical Filters ◽  
Bragg Gratings ◽  
Polarization Independent
Sign in / Sign up

Export Citation Format

Share Document