Article
Optics
Alejandro Velez-Zea, John Fredy Barrera-Ramirez
Summary: In this work, we propose a method for generating double phase multiplane holograms using a modified global Gerchberg Saxton algorithm. We demonstrate that this approach offers superior accuracy compared to the conventional algorithm in some scenarios and enables the trade-off between reconstruction quality and crosstalk. Numerical and experimental results support the effectiveness of our proposal.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Lu Rong, Shiyu Wang, Dayong Wang, Fangrui Tan, Yaya Zhang, Jie Zhao, Yunxin Wang
Summary: This letter introduces a new method for terahertz phase imaging, which retrieves object phase by iterating between axial intensity derivative and phase distribution, applicable to various samples and with higher reconstruction quality and less time cost compared to holographic phase retrieval algorithms.
Article
Materials Science, Multidisciplinary
Liangui Deng, Zile Li, Zhiqiang Guan, Jin Tao, Gongfa Li, Xiaoli Zhu, Qi Dai, Rao Fu, Zhou Zhou, Yan Yang, Shaohua Yu, Guoxing Zheng
Summary: It is shown that a bilayer metasurface can achieve arbitrary complex-amplitude modulation by arranging the orientation angles of nanostructures, increasing the lateral resolution and simplifying the design and fabrication process.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Zhitong Sun, Jiahao Zhi, Yuanlu Chen, Bijun Xu, Zhifang Qiu, Xiaogang Wang, Xinning Yu
Summary: Unlike other methods that only modify the phase of cross-polarization components, this paper presents a novel concept for multifunctional manipulation of a metasurface through full-phase modulation. This method allows for simultaneous and independent amplitude and phase control of both co- and cross-polarization components of circularly polarized waves. Experimental results at 980nm wavelength demonstrate the feasibility of this complex amplitude control method for circularly polarized light (left or right circularly polarized).
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Timur Z. Z. Minikhanov, Evgenii Y. Y. Zlokazov, Pavel A. A. Cheremkhin, Rostislav S. S. Starikov, Nikolay N. N. Evtikhiev
Summary: Achievements in high-speed spatial modulation electrooptic components enable the creation of optical-digital diffractive systems with superior performance compared to electronic counterparts. This study focuses on computer-generated holography methods using phase-only spatial light modulators to accurately form spatially-modulated information signals. Results from numerical and experimental implementations of bipolar intensity holograms and double-phase coding are compared. It is found that bipolar intensity holograms provide higher data density on the data page when using complex digital modulation methods, while double-phase coding shows potential for multilevel amplitude or intensity modulated data page reconstruction with precise control of phase modulation characteristics.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
JinPing Zhang, Jiagui Wu, Huan Yuan, Zehao Wang, Yang Deng, Zhenfu Zhang, Guiling Lin, Junbo Yang
Summary: This study presents a metalens array designed to convert circularly polarized light into a vortex beam and focus it, based on computer-generated holography technology. The conversion efficiency of the metalens array exceeds 80% at wavelengths of 420 nm, 550 nm, and 660 nm, with the aim of widespread applications in optical photography and optical communication systems.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
David Blinder, Peter Schelkens
Summary: The study introduces a novel high-performance point-based computer-generated holography algorithm that utilizes fixed-point integer representations, separability of the Fresnel transform, and a new look-up table free cosine representation. It reports a 3-fold speed up over an optimized floating-point GPU implementation, as well as a 15 dB increase in quality compared to a state-of-the-art FPGA-based fixed-point integer solution.
APPLIED SCIENCES-BASEL
(2021)
Article
Optics
Sungjae Park, Jonghyun Lee, Sungjin Lim, Mugeon Kim, Sunggyun Ahn, SoonHyoung Hwang, Sohee Jeon, Junho Jeong, Joonku Hahn, Hwi Kim
Summary: An efficient synthesis algorithm for wide-viewing full-color depthmap computer-generated holograms is proposed, integrating wave-optic geometry-mapping, color-matching, and noise-filtering. Computational parallelism and off-axis R.G.B simultaneous illumination method are utilized to achieve significant computational efficiency improvement and verify the feasibility of full-color sub-wavelength binary spatial light modulator technology.
Article
Optics
Kuixian Chen, Zhiqiang Guan, Zile Li, Yan Yang, Zhixue He, Shaohua Yu, Guoxing Zheng
Summary: In this study, computer-generated holographic nanoprinting using Pancharatnam-Berry phase modulation is demonstrated. This technique combines the advantages of both spectrum-modulated and polarization-modulated nanoprinting while avoiding their disadvantages. It enables single-channel/multichannel/color nanoprinting in a holography way, with unique characteristics such as incoherent light illumination, arbitrary brightness modulation, polarization insensitivity, and zero-dispersion. The holographic interference pattern generation further enhances the safety of information delivery.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Ryutaro Suda, Yohei Nishizaki, Makoto Naruse, Ryoichi Horisaki
Summary: We propose a method for computer-generated holography (CGH) that allows different images to be reproduced on both sides of a hologram using a single illumination source. This method utilizes a transmissive spatial light modulator (SLM) and a half mirror (HM) located downstream of the SLM. The light modulated by the SLM is partially reflected by the HM, and the reflected light is modulated again by the SLM for double-sided image reproduction. We derive an algorithm for double-sided CGH and demonstrate it experimentally.
Article
Physics, Applied
Zhiheng Du, Wenjing Zhao, Aiping Zhai, Zhaoxia Zhang, Dong Wang
Summary: Single-pixel detecting is a suitable method for wavefront reconstruction in certain wavelengths where array detectors are not available or in low light conditions. However, the commonly used liquid crystal spatial light modulator (LC-SLM) has a slow modulation speed, which limits the reconstruction speed. In contrast, our proposed method uses a digital-micromirror-device (DMD)-based single-pixel off-axis common-path interferometry (SOCI) to achieve faster wavefront reconstruction by utilizing the high modulation speed of the DMD.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Chaohui Wang, He-Xiu Xu, Tong Liu, Fan Zhang
Summary: The article introduces a new technique that achieves independent and arbitrary control of amplitude and phase responses for circularly polarized waves in full space through a hybrid phase approach. The concept is validated through experimental demonstration of a full-space dual-channel meta-hologram, manifesting the ability to display different images at different frequencies.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Dapu Pi, Juan Liu
Summary: The proposed reference light wave multiplexing scheme increases the information capacity of computer-generated holograms by generating holograms with different reference light waves and superimposing them together. The use of a modified Gerchberg-Saxton algorithm enhances image quality, allowing for reconstruction of different images with corresponding reference light waves. Numerical simulations and optical experiments demonstrate the feasibility of the scheme, showing successful reconstruction of multiple images with a single multiplexed hologram.
APPLIED SCIENCES-BASEL
(2021)
Article
Nanoscience & Nanotechnology
Ruichao Zhu, Jiafu Wang, Xinmin Fu, Xingsi Liu, Tonghao Liu, Zuntian Chu, Yajuan Han, Tianshuo Qiu, Sai Sui, Shaobo Qu, Cheng-Wei Qiu
Summary: In this paper, a method of inverse design of meta-atoms using customized deep ResNet is proposed to simultaneously and independently tailor the phase and amplitude of transmitted waves. Two holographic metasurfaces designed using this method significantly enhance design efficiency and verify the reliability of the design. This work paves the way for the intelligent design of metasurfaces.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Xianfeng Xu, Xinwei Wang, Weilong Luo, Hao Wang, Yuting Sun
Summary: An efficient computer-generated holography (ECGH) method is proposed in this study, which utilizes mixed linear convolutional neural networks (MLCNN) and introduces fully connected layers to enhance information mining and exchange. This method can be used to solve various image-reconstruction problems.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Markus Fratz, Dominik M. Giel, Peer Fischer
Article
Instruments & Instrumentation
Daniel Carl, Markus Fratz, Dominik M. Giel, Heinrich Hoefler
TM-TECHNISCHES MESSEN
(2012)
Article
Optics
Daniel Carl, Markus Fratz, Marcel Pfeifer, Dominik M. Giel, Heinrich Hoefler
Article
Optics
Markus Fratz, Stefan Sinzinger, Dominik Giel
Article
Biochemical Research Methods
Manuel Kemmler, Markus Fratz, Dominik Giel, Norbert Saum, Albrecht Brandenburg, Christian Hoffmann
JOURNAL OF BIOMEDICAL OPTICS
(2007)
Article
Optics
A Thelen, J Bongartz, D Giel, S Frey, P Hering
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2005)
Article
Physics, Fluids & Plasmas
B Sturman, DM Giel
Article
Optics
A Weis, D Giel, D Nettels
Article
Optics
D Giel, G Hinz, D Nettels, A Weis
