Opto-Electronic Advances, Год журнала: 2025, Номер 8(2), С. 250017 - 250017
Опубликована: Янв. 1, 2025
Язык: Английский
Opto-Electronic Advances, Год журнала: 2024, Номер 7(8), С. 240095 - 240095
Опубликована: Янв. 1, 2024
Based on the principle of super-symmetric lens with quadratic phase gradient transformation, combined digital coding metasurface, we propose a wide-angle coded metalens for focusing control in two-dimensional space. This achieves focus shift x-direction by changing oblique incidence angle incident wave, and y-direction combining convolution digitally metasurface to achieve flexible light plane. The unit is mainly composed three-layer metal structure two layers medium, transmission obtained middle layer structure, which turn obtains required distribution metalens. design realizes function large viewing at x-polarized incidence, control. Experimentally, prepared designed tested experimental results are good agreement results.
Язык: Английский
Процитировано
20
Optics Communications, Год журнала: 2025, Номер unknown, С. 131768 - 131768
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
8
Opto-Electronic Science, Год журнала: 2023, Номер 2(11), С. 230037 - 230037
Опубликована: Янв. 1, 2023
Super-resolution
(SR)
microscopy
has
dramatically
enhanced
our
understanding
of
biological
processes.
However,
scattering
media
in
thick
specimens
severely
limits
the
spatial
resolution,
often
rendering
images
unclear
or
indistinguishable.
Additionally,
live-cell
imaging
faces
challenges
achieving
high
temporal
resolution
for
fast-moving
subcellular
structures.
Here,
we
present
principles
a
synthetic
wave
(SWM)
to
extract
three-dimensional
information
from
unlabeled
specimens,
where
photobleaching
and
phototoxicity
are
avoided.
SWM
exploits
multiple-wave
interferometry
reveal
specimen’s
phase
area
interest,
which
is
not
affected
by
optical
path.
achieves
~0.42
Язык: Английский
Процитировано
28
Laser & Photonics Review, Год журнала: 2024, Номер 18(6)
Опубликована: Фев. 15, 2024
Abstract Non‐line‐of‐sight (NLOS) imaging enables the reconstruction of targets beyond direct line sight, which has extensive applications across various fields. However, it remains unclear how and to what extent vectorial nature light, plays a critical role in optical object recognition, can enhance performance active NLOS imaging. Here, this work proposes method that utilizes vector fields (VOFs) with arbitrarily designed polarization distributions realize challenging conditions low signal‐to‐noise ratio (SNR). A generalized VOF reflection model is established at relay surface for determine optimal illumination angle as well received polarization. Based on model, feasibility multi‐view demonstrated enhanced SNR echo signals under proper modulation, surpassing limitations conventional single‐view Simulations experiments validate superior proposed approach accurate recognition hidden objects.
Язык: Английский
Процитировано
12
Opto-Electronic Advances, Год журнала: 2024, Номер 7(7), С. 240062 - 240062
Опубликована: Янв. 1, 2024
Язык: Английский
Процитировано
11
Nano Letters, Год журнала: 2024, Номер 24(25), С. 7609 - 7615
Опубликована: Июнь 11, 2024
Long-wave infrared (LWIR) imaging, or thermal is widely applied in night vision and security monitoring. However, the widespread use of LWIR imagers impeded by their bulky size, considerable weight, high cost. While flat meta-optics present a potential solution to these limitations, existing pure face constraints such as severe chromatic coma aberrations. Here, we introduce an approach utilizing large-scale hybrid address challenges demonstrate achromatic, coma-corrected, polarization-insensitive imaging. The metalens doublet composed metasurface corrector refractive lens, featuring full field-of-view angle surpassing 20° within 8-12 μm wavelength range. Employing this doublet, showcase high-performance imaging capabilities both indoors outdoors, effectively capturing ambient radiation. proposed holds promise for advancing miniaturized, lightweight, cost-effective optical systems.
Язык: Английский
Процитировано
10
Materials Research Bulletin, Год журнала: 2024, Номер 174, С. 112751 - 112751
Опубликована: Фев. 20, 2024
Язык: Английский
Процитировано
9
Nanophotonics, Год журнала: 2024, Номер 13(20), С. 3765 - 3792
Опубликована: Июнь 6, 2024
Abstract Recent advancements in inverse design approaches, exemplified by their large-scale optimization of all geometrical degrees freedom, have provided a significant paradigm shift photonic design. However, these innovative strategies still require full-wave Maxwell solutions to compute the gradients concerning desired figure merit, imposing, prohibitive computational demands on conventional computing platforms. This review analyzes challenges associated with structures. It delves into adequacy various electromagnetic solvers for designs, from neural network-based solvers, and discusses suitability limitations. Furthermore, this evaluates research techniques, advantages disadvantages applications, sheds light cutting-edge studies that combine networks applications. Through comprehensive examination, aims provide insights navigating landscape advocate strategic methods, solver selection, integration overcome barriers, thereby guiding future
Язык: Английский
Процитировано
9
Physica Scripta, Год журнала: 2024, Номер 99(3), С. 036002 - 036002
Опубликована: Янв. 19, 2024
Abstract In order to speed up the process of optimizing design metasurface absorbers, an improved model for absorbers based on autoencoder (AE) and BiLSTM-Attention-FCN-Net (including bidirectional long-short-term memory network, attention mechanism, fully-connection layer network) is proposed. The structural parameters can be input into forward prediction network predict corresponding absorption spectra. Meantime, obtained by inputting spectra inverse network. Specially, in (BiLSTM) effectively capture context relationship between spectral sequence data, mechanism enhance BiLSTM output features, which highlight critical feature information. After training, mean square error (MSE) value validation set reverse converges 0.0046, R 2 reaches 0.975, our accurately structure within 1.5 s with a maximum 0.03 mm. Moreover, this achieve optimal multi-band including single-band, dual-band, three-band absorptions. proposed method also extended other types optimization design.
Язык: Английский
Процитировано
8
Opto-Electronic Science, Год журнала: 2024, Номер 3(10), С. 240014 - 240014
Опубликована: Янв. 1, 2024
Design of multiple-feed lens antennas requires multivariate and multi-objective optimization processes, which can be accelerated by PSO algorithms. However, the algorithm often fails to achieve optimal results with limited computation resources since spaces candidate solutions are quite large for antenna designs. This paper presents a design paradigm based on physics-assisted particle swarm (PA-PSO) algorithm, guides particles laws physics. As proof concept, compact metalens is proposed, measures unprecedented performances, such as field view at ±55°, 21.7 dBi gain flatness within 4 dB, 3-dB bandwidth >12°, f-number 0.2. The proposed PA-PSO reaches 6 times faster than ordinary endows promising applications in including but not
Язык: Английский
Процитировано
8