Article
Optics
Zichan Wang, Youngsik Kim, Tom D. Milster
Summary: The article discusses the potential applications of large diameter, high-harmonic diffractive lenses in future space telescopes, as well as solutions to reduce chromatic dispersion and other aberrations to achieve diffraction-limited performance. By using a relay subsystem and a color corrector with refractive and diffractive optical elements, longitudinal chromatic aberrations can be significantly reduced while maintaining the effective focal length and numerical aperture of the system.
Article
Optics
Stefano L. Oscurato, Francesco Reda, Marcella Salvatore, Fabio Borbone, Pasqualino Maddalena, Antonio Ambrosio
Summary: This study overcomes the fundamental limitation of static optical devices by introducing shapeshifting diffractive optical elements written on erasable photoresponsive material to provide real-time changes in optical functionalities. A new lithographic configuration is developed for writing/erasing cycles of aligned optical elements in the light path, showing the realization of complex diffractive gratings and a reconfigurable diffractive lens in the light path. The approach opens new possibilities for on-demand reconfiguration in emerging areas of photonics.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Hongfang Yang
Summary: This paper proposes a method that combines the effective area method and the oblique factors to analyze and design dual-layer diffractive optical elements at large incident angles. The method was validated by numerical simulations and showed similar diffraction efficiency distributions at different wavelengths and incident angles.
Article
Optics
Oriel Mendoza-yero
Summary: A surface-pixeled convergent lens with arbitrary modulation of amplitude and phase along the depth of focus is introduced using the scalar theory of diffraction. This complex diffractive lens is computer-generated from an exact solution of the inverse focal shaping problem obtained by utilizing the Fresnel diffraction integral. The technique of spatial multiplexing is used to encode the complex diffractive lens into a phase optical element that can be dynamically implemented using a commercial liquid-crystal spatial light modulator. The optical surface of this lens, which can generate both a single axial focus and multiple parallel foci, exhibits neither linear nor rotational symmetry but rather phase jumps between pixels.
Article
Optics
Zhi-Yong Hu, Tong Jiang, Zhen-Nan Tian, Li-Gang Niu, Jiang-Wei Mao, Qi-Dai Chen, Hong-Bo Sun
Summary: This study presents a general designing and processing scheme for optofluidic-integrated broad-bandwidth M-DOEs with high diffraction efficiency across the entire visible band. Demonstrating a wideband operating micro-diffractive lens and orbital angular momentum beam micro-generator, this strategy offers a common protocol for various broad-bandwidth M-DOEs in integrated optical systems.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Jia-Ahn Pan, Zichao Rong, Yuanyuan Wang, Himchan Cho, Igor Coropceanu, Haoqi Wu, Dmitri Talapin
Summary: This work demonstrates the direct optical patterning of oxide nanoparticles, allowing for micron resolution patterning of materials like ZrO2, TiO2, HfO2, and ITO. By mixing the nanoparticles with a photosensitive compound and irradiating with 405 nm light, the researchers were able to achieve precise patterning and control of material properties for use in photonic applications. The fabricated structures showed excellent optical transparency, high refractive index, and good thermal stability, making them suitable for diffractive optical elements and other photonic devices.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Optics
Angela Soria-Garcia, Jesus del Hoyo, Luis Miguel Sanchez-Brea, Veronica Pastor-Villarrubia, Veronica Gonzalez-Fernandez, Mahmoud H. Elshorbagy, Javier Alda
Summary: This article introduces a device that uses a Vector Diffractive Optical Element (VDOE) to determine the polarization state of an incident light beam. The device is able to simultaneously evaluate the four Stokes parameters of the light under analysis. The VDOE is sectorized into several Fresnel zone plates, enabling a compact arrangement and facilitating optoelectronical integration. The authors have also developed a procedure to remove diffractive effects and systematic errors. From the simulated results, the device is able to identify any polarization incident state with an averaged uncertainty of 0.006%. Finally, the authors experimentally verify the VDOE with non-ideal polarization elements to further validate and test their proposed design, with an averaged uncertainty of 3.33%.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Deniz Mengu, Yifan Zhao, Anika Tabassum, Mona Jarrahi, Aydogan Ozcan
Summary: This study presents the use of diffractive optical networks to perform permutation operations with a large number of input-output connections. By using deep learning techniques, the capacity of the diffractive optical network to approximate permutation operations increases with the number of diffractive layers and trainable transmission elements in the system. The authors also addressed challenges related to physical alignment and output efficiency by designing misalignment tolerant diffractive designs. The proposed diffractive permutation networks have potential applications in security, image encryption, and data processing, and can serve as channel routing and interconnection panels in wireless networks.
Article
Biochemical Research Methods
Cilong Zhang, Ning Xu, Qiaofeng Tan
Summary: This paper proposes a novel design method for generating high spatial frequency lattice patterns, improving the super-resolution imaging performance of structured illumination microscopy.
BIOMEDICAL OPTICS EXPRESS
(2022)
Article
Optics
Angela Soria-Garcia, Luis Miguel Sanchez-Brea, Jesus del Hoyo, Francisco Jose Torcal-Milla, Jose Antonio Gomez-Pedrero
Summary: We generalized the angular diffractive lenses by defining the angular distribution of the focal length as a Fourier series. Using Particle Swarm Optimization algorithm, we optimized the Fourier coefficients of the lens to minimize the beam width and increase its uniformity for a given depth of focus. The experimental verification using a Spatial Light Modulator showed that the Fourier series diffractive lens has a more uniform and narrower beam than previous angular lenses.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Shenyu Dai, Xin Zheng, Shuai Zhao
Summary: We propose a new method for designing diffractive optical elements (DOE) to shape partially coherent beams. The diffraction patterns of a DOE under a certain partially coherent beam can be modeled by the convolution of the coherent diffraction pattern and the inherent degree of coherent function. Two types of diffraction anomalies induced by partially coherent beams, line-end shortening and corner rounding, are discussed. A proximity correction (PC) method similar to the optical proximity correction (OPC) technique in lithography is used to compensate for these anomalies. The designed DOE demonstrates good performance in shaping partially coherent beams and suppressing noise.
Article
Engineering, Electrical & Electronic
Artur Sobczyk, Michal Makowski, Adam Kowalczyk, Jaroslaw Suszek, Maciej Traczyk, Maciej Sypek
Summary: Mirror-less digital holography allows three-dimensional visualizations of optically opaque objects without the need for mirrors, preserving polarization and contrast in fringes.
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
(2023)
Article
Materials Science, Multidisciplinary
Wei Jia, Dajun Lin, Berardi Sensale-Rodriguez
Summary: Machine learning enables the design of cascaded DOEs at terahertz frequencies with tailored multi-degree-of-freedom reconfigurable holograms. This provides unprecedented control over spatial terahertz light distribution, impacting applications like signal multiplexing, imaging, and displays. The designs are validated through 3D FDTD simulations and experimental measurements, showing the generation of desired diffraction patterns in all cases.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Jiawei Meng, Yaliang Gui, Behrouz Movahhed Nouri, Xiaoxuan Ma, Yifei Zhang, Cosmin-Constantin Popescu, Myungkoo Kang, Mario Miscuglio, Nicola Peserico, Kathleen Richardson, Juejun Hu, Hamed Dalir, Volker J. Sorger
Summary: Researchers demonstrate a multistate electrically programmed low-loss nonvolatile photonic memory based on a broadband transparent phase-change material. The memory features efficient amplitude modulation and ultralow insertion loss, showing a significant improvement in signal to loss ratio compared to other phase-change-materials based photonic memories.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Pawel Komorowski, Patrycja Czerwinska, Mateusz Kaluza, Mateusz Surma, Przemyslaw Zagrajek, Artur Sobczyk, Wieslaw Ciurapinski, Ryszard Piramidowicz, Agnieszka Siemion
Summary: This paper introduces diffractive optical elements for frequency division multiplexing of terahertz waves, consisting of a binary phase grating and a converging diffractive lens. Experimental results show that these structures can independently detect signals of different carrier frequencies without significant crosstalk.
APPLIED SCIENCES-BASEL
(2021)
