Article
Optics
Paulina Komar, Marcin Gebski, James A. Lott, Michal Wasiak
Summary: This study presents an experimental and theoretical analysis of chromatic aberration in a monolithic metasurface focusing mirror, showing that the focal point position shifts inversely proportional to the wavelength. Numerical simulations reveal that simply modifying the grating height does not significantly alter the focal length or reduce chromatic aberration.
Article
Optics
Natsima Sakda, Souvik Ghosh, Ratchapak Chitaree, B. M. Azizur Rahman
Summary: Optical metasurface is a combination of nanostructured unit cells that provide unique optical and electrical properties. By incorporating a phase change material, such as GST or GSST, the metasurface can achieve agile and tunable functions, resulting in reduced insertion loss, enhanced extinction ratio, and increased figure of merit.
Article
Multidisciplinary Sciences
Farhan Ali, Serap Aksu
Summary: The study introduces magnesium oxide as an ideal material for UV metalenses and designs metalenses capable of efficient focusing over a broad UV frequency range. Experimental results demonstrate excellent focusing efficiency and optical performance of the metalenses, making them highly promising for UV nanophotonic systems.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Peiyao Lu, Changda Zhou, Zhen Mou, Danhua Liu, Shuyun Teng
Summary: This paper explores the optical performance of metasurface phase devices based on anisotropic nanounits, specifically metalenses and vortex metalenses. The study demonstrates the differences in structure, polarization dependence, efficiency, and phase uniformity among the different elements, highlighting the advantages of various phase compensation techniques for expanding practical applications of metasurfaces.
Article
Optics
Daniele Pirone, Joowon Lim, Francesco Merola, Lisa Miccio, Martina Mugnano, Vittorio Bianco, Flora Cimmino, Feliciano Visconte, Annalaura Montella, Mario Capasso, Achille Iolascon, Pasquale Memmolo, Demetri Psaltis, Pietro Ferraro
Summary: By applying computational segmentation, the three-dimensional quantitative shape of a cell nucleus can now be accurately identified without fluorescent staining. This method avoids the difficulties or impossibilities associated with cell staining and allows for the extraction of specific intracellular structures.
Article
Chemistry, Analytical
Miao Zhao, Binbin Yu, Jing Du, Jing Wen
Summary: This study presents the design and realization of silicon-based metalenses for widefield imaging in a broad spectrum. By optimizing the aspect ratio of the nanorods, the fabrication difficulty is reduced. The experimental demonstration of widefield imaging by the metalens and the comparison with simulated results are also successfully achieved.
Article
Optics
Jeremy Teichman
Summary: Thin lenses with sufficient diameter and focusing power cannot fully compensate for variations in free-space time of flight, effectively limiting their ability to maintain and focus an intact wavefront. The temporal coherence of illumination imposes strict limits on the performance of thin lenses, diffractive optical elements, and metalenses, as demonstrated through time-domain analysis. This study highlights the importance of considering temporal coherence in the design and performance evaluation of optical elements.
Article
Optics
Hui Ge, Chong Sheng, Shining Zhu, Hui Liu
Summary: The Unruh effect, a fascinating aspect of quantum fields in curved spacetime, remains a challenge for direct experimental detection of Unruh temperature. Gradient optical waveguides are proposed to achieve high effective Unruh temperature, but experimental realization is yet to be reported. This study uses a tapered fiber to simulate accelerated motion and obtains effective Unruh temperature, showing a dependence of leaky radiation on photon acceleration.
Article
Optics
Arnab Panda, Kanik Palodhi, Rajib Chakraborty, Soumen Maiti
Summary: This study quantitatively investigates how mesoporous top surfaces improve the performance of perovskite solar cells, achieving high conversion efficiency through structural modifications and material replacements.
Article
Multidisciplinary Sciences
O. Kruger, N. Chetty
Summary: The study focuses on the design, manufacturing, and testing of a permanent vacuum refractometer to improve accuracy and long-term stability, avoiding the use of a vacuum pump.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Kelei Xi, Bin Fang, Li Ding, Lin Li, Songlin Zhuang, Qingqing Cheng
Summary: The research team has developed a new antenna design that utilizes a metasurface to generate high-quality Airy beams. By stimulating a special metasurface with circularly polarized waves in a waveguide, Airy beams can be generated. This technology has potential applications in on-chip imaging and holography.
Article
Optics
Long Cheng, Fabio Formisano, Kirill A. Grishunin, Sergey D. Gorelov, Paul H. M. van Loosdrecht, Jian Yan, Xuan Luo, Zhigao Sheng, Evgeny A. Mashkovich
Summary: This study demonstrates the efficient induction of the quadratic electro-optic effect (Kerr effect) by a terahertz (THz) electric field in the quasi-two-dimensional material MnPS3. The findings suggest that MnPS3 has the potential to be a promising candidate for practical applications in future ultrafast electro-optical devices.
Article
Optics
Di Wu, Manli Wei, Sitong Liu, Runhua Li, Ji Ma
Summary: A high-performance Bloch surface wave biosensor was constructed for the detection of hemoglobin by optimizing the buffer layer parameters. The optimized biosensor showed high quality factor and figure of merit, making it promising for future hemoglobin detection.
Article
Engineering, Electrical & Electronic
Hadeer H. H. AbdelAziz
Summary: In this study, a SCAPS-1D simulation was performed on HTL-free CsPbI3 perovskite solar cells. It was found that by optimizing the device structure and parameters, the PCE of the solar cells reached 17.2% with Se as a back metal contact and an optimized absorber thickness of 2000 nm, doping density of 1 x 10(19) cm(-3), and defect density of 2 x 10(12) cm(-3). This simulation study may guide the fabrication of low-cost and highly efficient HTL-free inorganic CsPbI3 solar cells.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Multidisciplinary Sciences
Amit Kumar Goyal, Ajay Kumar, Yehia Massoud
Summary: This manuscript proposes a heterostructure-based topological nanophotonic structure for improved sensing performance. By connecting two dissimilar one-dimensional photonic crystal structures with overlapped photonic bandgaps, the topological effect is realized. The structure exhibits robust topological interface state excitation and enhanced sensing capability. Compared to conventional structures, it offers higher sensitivity, quality factor, and interface field confinement.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Johannes E. Froch, Shane Colburn, Alan Zhan, Zheyi Han, Zhuoran Fang, Abhi Saxena, Luocheng Huang, Karl F. Bohringer, Arka Majumdar
Summary: An important challenge in contemporary photonics research is the miniaturization of optical components and devices for more compact and energy-efficient mobile platforms. Arrays of subwavelength scatterers, or meta-optics, provide a solution by shaping and manipulating transmitted optical wavefronts. This paper presents the concept of a computational spectrometer that utilizes a high-efficiency double helix meta-optic and computational back end to accurately reconstruct optical spectra.
Article
Optics
Anna Wirth-Singh, Johannes E. Froch, Zheyi Han, Luocheng Huang, Saswata Mukherjee, Zhihao Zhou, Zachary Coppens, Karl F. Bohringer, Arka Majumdar
Summary: A broad range of imaging and sensing technologies in the infrared require large field-of-view operation. Traditional refractive systems often employ multiple elements to compensate for aberrations, leading to excess size, weight, and cost. Meta-optics, which are significantly thinner and lighter than traditional refractive lenses, can dramatically reduce the size, weight, and cost of these imaging systems. In this paper, an all-silicon meta-optic with an entrance aperture and lens focal length of 1 cm is used to demonstrate 80 degrees FoV thermal imaging in the long-wavelength infrared regime (8-12 μm).
Article
Optics
Forrest Miller, Rui Chen, Johannes E. Froch, Hannah Rarick, Sarah Geiger, Arka Majumdar
Summary: Photonic integrated circuits (PICs) can greatly enhance the capabilities of optical information science and engineering. We propose using wide-bandgap non-volatile phase-change materials (PCMs) to create rewriteable PICs. A nanosecond pulsed laser can be used to write a PCM-based PIC without removing any material. The entire circuit can be erased by heating and a new circuit can be rewritten. Our proposed platform enables low-cost manufacturing and has significant implications for rapid prototyping of PICs, design validation, and photonic education.
Article
Multidisciplinary Sciences
Rui Chen, Zhuoran Fang, Christopher Perez, Forrest Miller, Khushboo Kumari, Abhi Saxena, Jiajiu Zheng, Sarah J. Geiger, Kenneth E. Goodson, Arka Majumdar
Summary: A wide-bandgap PCM antimony sulfide (Sb2S3)-clad silicon photonic platform is reported, which achieves low loss, high extinction ratio, high cyclability, and 5-bit operation. The Sb2S3-based devices are programmed via on-chip silicon PIN diode heaters within sub-ms timescale, with controllable multilevel operations achieved by applying multiple identical pulses.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Christopher Munley, Arnab Manna, David Sharp, Minho Choi, Hao A. Nguyen, Brandi M. Cossairt, Mo Li, Arthur W. Barnard, Arka Majumdar
Summary: Engineering the dispersion of light in a metasurface enables control of the light-matter interaction, and we demonstrate a metasurface with a flat dispersion at visible wavelengths. By integrating cadmium selenide nanoplatelets, we measured coupled photoluminescence into the flatband. This enables potential applications in nonlinear image processing and topological photonics.
Article
Nanoscience & Nanotechnology
Saswata Mukherjee, Quentin A. A. Tanguy, Johannes E. Froch, Aamod Shanker, Karl F. Bohringer, Steven Brunton, Arka Majumdar
Summary: Ultrathin flat meta-optics have shown promise for holography, but most reported holograms only modulate phase and neglect amplitude. Complex phase modulation typically requires polarization-sensitive meta atoms or complex scatterers. This study demonstrates polarization-independent holography with both amplitude and phase modulation using dielectric meta-optics. The researchers also show that meta-optical holography can be achieved using partially incoherent light from an LED, reducing alignment complexity.
Article
Optics
Thomas Pertsch, Shumin Xiao, Arka Majumdar, Guixin LI
Summary: Optical metasurfaces are a crucial area of research worldwide due to their potential applications in imaging, wavefront engineering, nonlinear optics, and quantum information processing. The feature issue "Optical Metasurfaces: Fundamentals and Applications in Photonics Research" aims to publish and disseminate the latest works in optical metasurfaces among the photonics community.
PHOTONICS RESEARCH
(2023)
Article
Multidisciplinary Sciences
Samuel Pinilla, Johannes E. Froch, Seyyed Reza Miri Rostami, Vladimir Katkovnik, Igor Shevkunov, Arka Majumdar, Karen Egiazarian
Summary: A HIL optics design methodology is used to overcome limitations in the design of miniature color cameras using flat meta-optics. The resulting camera achieves high-quality full-color imaging, outperforming a compound multi-lens optics of a mirrorless commercial camera.
Article
Multidisciplinary Sciences
Abhi Saxena, Arnab Manna, Rahul Trivedi, Arka Majumdar
Summary: Photonic coupled cavity arrays have the potential to be a scalable and high-temperature platform for simulating Hamiltonians, but programmability and nonlinearity of photonic cavities are still challenging. In this study, a programmable photonic cavity array made of silicon material is demonstrated, which can control the temperature of each cavity independently, implement tight-binding Hamiltonians in the telecom regime, and reduce the thermal crosstalk between neighboring sites.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Rui Chen, Virat Tara, Anna-wirth Singh, Abhi Saxena, Johannes E. Froch, Matthew S. Reynolds, Arka Majumdar
Summary: This opinion article proposes a novel system that combines energy-efficient modulators in photonic integrated circuits (PICs) with a meta-optical beam aggregator to overcome the challenges of increasing the space-bandwidth product. This hybrid approach can significantly improve the space-bandwidth product, theoretically reaching up to 1013 Hz center dot pixel, which is several orders of magnitude higher than the state-of-the-art.
OPTICAL MATERIALS EXPRESS
(2023)
Editorial Material
Materials Science, Multidisciplinary
Arka Majumdar, Johannes Froech, Chang-hua Liu, Hui Deng, Donguk Nam, Alexander Tartakovskii
Summary: This article is an introduction to the special issue on photonics with 2D materials.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Materials Science, Multidisciplinary
Zhuoran Fang, Bassem Tossoun, Antoine Descos, Di Liang, Xue Huang, Geza Kurczveil, Arka Majumdar, Raymond G. Beausoleil
Summary: Silicon photonics has become increasingly important in data communication, and programmable silicon photonic integrated circuits now have a non-volatile phase shifter with significantly improved energy efficiency, speed, and endurance. This technology has potential applications in future energy-efficient programmable PICs, optical neural networks, and quantum information processing.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Arnab Manna, Johannes E. Froch, John Cenker, Sinabu Pumulo, Arthur W. Barnard, Jiun-Haw Chu, Xiaodong Xu, Arka Majumdar
Summary: Tunablenanophotonic resonators are crucial for material-integrated photonic systems and solid-state cavity quantumelectrodynamic experiments. Matching the cavity resonance with the material optical transition is important for enhancing light-matter interaction, which leads to various phenomena with implications in quantum optics and optoelectronics. However, precise control of the resonant wavelength of nanofabricated optical cavities is challenging, requiring postfabrication dynamical tuning, especially in cryogenic environments. In this study, we achieved large in situ strain tuning of an integrated monolayer WSe2-galliumphosphide cavity device. We successfully tuned an on-substrate cavity with a quality (Q)-factor of approximately 3500 at around 780nm by approximately 5nm without any degradation of the Q-factor at cryogenic temperature. The tunable cavity modes were observed as cavity-enhanced monolayer exciton photoluminescence.
Review
Nanoscience & Nanotechnology
Zhuoran Fang, Rui Chen, Bassem Tossoun, Stanley Cheung, Di Liang, Arka Majumdar
Summary: Programmable photonics, using non-volatile materials, have become increasingly important in various applications. This review discusses the recent progress and potential applications of non-volatile materials in programmable photonics, serving as a reference for future research directions.
Article
Optics
Haonan Ling, Arnab Manna, Jialiang Shen, Ho-Ting Tung, David Sharp, Johannes Froch, Siyuan Dai, Arka Majumdar, Artur R. Davoyan
Summary: This study investigates the interaction between light and matter in van der Waals MoS2 nanophotonic devices and demonstrates deep subwavelength optical field confinement in nanostructures, which has the potential to significantly reduce the size of integrated photonic devices and opto-electronic circuits.