Article
Thermodynamics
Hamdy M. Youssef, Eman A. N. Al-Lehaibi
Summary: In this paper, analysis was conducted on thermoelastic homogeneous isotropic nanobeams using a generalized model of viscothermoelasticity theory. The study revealed that the thickness of nanobeams and the variability of thermal conductivity have significant effects on the studied state functions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Optics
Tao Ma, Yongsheng Tian, Linxing Su, Huan Wang, Heng Liu, Fang Wang
Summary: The performance of EO modulators based on polymer-embedded silicon racetrack resonators is investigated, and the modulation performances of different materials are compared. The results show that modulators embedded with lithium niobate achieve high modulation depth and low wavelength tuning, while modulators embedded with hybrid materials have high wavelength tuning but low modulation depth.
Article
Engineering, Electrical & Electronic
Li Liu, Mengyuan Ye, Zhihua Yu, Wei Xue
Summary: We have proposed and demonstrated a narrowband notch microwave photonic filter (MPF) with an ultra-high all-optical tuning efficiency. By optimizing the structural parameters and hole shapes of a nanobeam photonic crystal cavity, we achieved a high-Q factor of 4 x 10^8, a small mode volume, and a compact size. The central frequency of the MPF can be widely tuned through adjusting the wavelength of the optical carrier, and it can also be all-optically tuned based on the nonlinear effects in the cavity with an ultra-high tuning efficiency of 308.8 GHz/mW.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Youngmin Kim, Hyo-Jun Joo, Melvina Chen, Bongkwon Son, Daniel Burt, Xuncheng Shi, Lin Zhang, Zoran Ikonic, Chuan Seng Tan, Donguk Nam
Summary: A scalable technique is presented in this article to produce identical on-chip lasers by dynamically controlled strain engineering. By using localized laser annealing, the strain in the laser gain medium can be controlled to precisely match the emission wavelengths of several GeSn one-dimensional photonic crystal nanobeam lasers whose initial emission wavelengths are significantly varied. The method enables the emission wavelength tuning of more than 10 nm without degrading the laser emission properties.
Article
Chemistry, Multidisciplinary
Norifumi Asakuma, Shotaro Tada, Erika Kawaguchi, Motoharu Terashima, Sawao Honda, Rafael Kenji Nishihora, Pierre Carles, Samuel Bernard, Yuji Iwamoto
Summary: Through the synergistic action of PHPS and NiCl2, Ni nanocrystals were successfully formed at a lower temperature, demonstrating that NiCl2 can act as a catalyst to achieve dehydrocoupling reactions between Si-H and N-H bonds, resulting in the formation of Ni-N bonds.
Article
Chemistry, Multidisciplinary
David Hoch, Xiong Yao, Menno Poot
Summary: We introduce a novel method to geometrically tune the tension in prestrained resonators. The method involves making Si3N4 strings with a designed predisplacement and allows for the study of dissipation mechanisms dependent on the stress. The results obtained from experiments and simulations show that the geometrically controlled stress can not only tune the resonator frequencies but also the damping rate. The findings have significant implications for the design and optimization of resonators.
Article
Nanoscience & Nanotechnology
Pariksha Malik, Debalaya Sarker, Dileep Kumar, Matthias Schwartzkopf, Pankaj Srivastava, Santanu Ghosh
Summary: By using ion beam irradiation to control the shape and size of gold nanoparticles, stable and repeatable SERS signals can be achieved. The shape evolution is caused by localized melting and pressure increase induced by irradiation. This method not only allows the design of stable SERS substrates, but also opens up new research avenues in fields such as photovoltaics and optoelectronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Optics
Jin-Yue Su, Xun-Qiang Huang, Han-Lei Xu, Jin-Yun Zhou, Zi-Ming Meng
Summary: In this paper, a feasible scheme for all-optical switching based on Fano resonance is proposed and studied. The scheme utilizes the advantages of a silicon-polymer compound photonic crystal nanobeam side-coupled with a slotted nanobeam cavity, including its compact size, ultrafast response, ultralow switching energy, and ease of fabrication. The proposed structure shows great potential in realizing high-performance and practical integratable all-optical switching.
Article
Engineering, Electrical & Electronic
Tao Guo, Sai Gao, Huiying Zeng, Linlong Tang, Ciyuan Qiu
Summary: This study presents and demonstrates a method for all-optical control of a single resonance in a graphene-on-silicon nanobeam cavity, achieving efficient all-optical tuning and switching with high extinction ratio and rapid response time.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Weide Wang, Dongxu Yao, Hanqin Liang, Yongfeng Xia, Kaihui Zuo, Jinwei Yin, Yu-Ping Zeng
Summary: The addition of GdH2 increases the N/O ratio in the liquid phase, enhancing thermal conductivity while reducing flexural strength at high temperatures. This is mainly due to the exaggerated bimodal microstructure resulting from the substitution of Gd2O3 by GdH2.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Jingcun Liu, Ruizhe Zhang, Ming Xiao, Subhash Pidaparthi, Hao Cui, Andrew Edwards, Cliff Drowley, Yuhao Zhang
Summary: This article demonstrates for the first time that avalanche current in GaN JFETs can flow through the source by using a MOSFET driver with a large gate resistance or an RC-interface driver. Physics-based mixed-mode electrothermal simulations reveal the carrier dynamics under different avalanche paths. Additionally, it shows that the RC-interface driver outperforms the MOSFET driver for GaN JFETs.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Chemistry, Physical
Weide Wang, Dongxu Yao, Hanqin Liang, Yongfeng Xia, Kaihui Zuo, Jinwei Yin, Yu-Ping Zeng
Summary: This study reports the two-step sintering process of Si3N4 doped with MgO and ZrH2, which improved thermal conductivity and microstructure of the material. The use of ZrH2 contributed to effective oxygen removal and densification of the Si3N4 ceramics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Miao Zhou, Yun Liu, Xiaolei Li, Tianyi Sui, Dong Su, Huiming Ji
Summary: Silicon nitride (Si3N4) ceramics were prepared using Y2O3-MgSiN2 as a sintering additive, and the densification behavior, phase transition, and microstructure evolution were investigated. The microstructure was found to change from bimodal to homogeneous with a decrease in grain size as the Y2O3-MgSiN2 content increased. The sample with 6 mol% Y2O3-MgSiN2 exhibited excellent performance with a high thermal conductivity of 84.1 W/(m · K), fracture toughness of 8.97 MPa m1/2, and flexural strength of 880.2 MPa.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Yinsheng Li, Ha-Neul Kim, Haibo Wu, Mi-Ju Kim, Jae-Woong Ko, Young-Jo Park, Zhengren Huang, Hai-Doo Kim
Summary: The Y2O3 content in Si3N4 ceramics affects the microstructure and thermal conductivity, with higher Y2O3 content leading to changes in liquid phase behavior and grain size distribution. The microstructure significantly influences the thermal conductivity of the ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Jie Zhang, Fei Li, Liran Dong, Zhanglin Chen, Wei Cui, Songmo Du, Shijia Zhang, Kexin Chen, Guanghua Liu
Summary: Spherical Si@Si3N4 granules were successfully synthesized using in situ combustion synthesis. The granules have a dense internal structure without cracks, and the Si3N4 grains on the surface are well-bonded without the use of binders. The synthesized granules show great potential for heat dissipation in electronic devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
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.