Review
Nanoscience & Nanotechnology
Thomas Ferreira de Lima, Eli A. Doris, Simon Bilodeau, Weipeng Zhang, Aashu Jha, Hsuan-Tung Peng, Eric C. Blow, Chaoran Huang, Alexander N. Tait, Bhavin J. Shastri, Paul R. Prucnal
Summary: This paper introduces neuromorphic photonic processors based on resonator weight banks, which are emerging candidate technology for enabling modern artificial intelligence in high speed analog systems. These purpose-built analog devices leverage the physics of resonator devices to implement vector multiplications, offering efficiency, latency, and throughput advantages over equivalent electronic circuits. However, the challenges of compensation for fabrication variations and environmental disturbances need to be addressed through automated design and control methodologies for practical deployment.
Article
Materials Science, Multidisciplinary
Stefan Aeby, Geoffroy J. Aubry, Nicolas Muller, Frank Scheffold
Summary: This study introduces defects into 3D woodpile photonic crystals using direct laser writing, and demonstrates that defect scattering can be modeled by considering the difference between disordered and regular structures. These findings pave the way for better control and understanding of the role of defects in photonic materials for potential applications.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Jicheng Jin, Jian Lu, Bo Zhen
Summary: Second harmonic dipoles generated in a nonlinear photonic crystal slab can be completely nonradiative, resulting in no energy transfer from the fundamental frequency to the second harmonic even when the phase-matching condition is satisfied - a phenomenon known as resonance-forbidden second-harmonic generation. Through numerical simulation, two mechanisms for achieving this phenomenon have been identified: symmetry protection and parameter tuning. The finite-size effect and the topological origin of this phenomenon are also discussed.
Article
Nanoscience & Nanotechnology
Sonia Mary Buckley, Alexander N. N. Tait, Adam N. N. McCaughan, Bhavin J. J. Shastri
Summary: Emerging neuromorphic hardware utilizes physical processes at the device level to compute neural networks, promising faster and energy-efficient solutions compared to traditional computing. However, the programming or training of photonic neuromorphic hardware can be power-hungry and time-consuming. This article examines the online learning paradigm as a necessary approach for realizing the true potential of photonic neuromorphic hardware.
Article
Physics, Multidisciplinary
ZhaoXian Su, BingYi Liu, LingLing Huang, YongTian Wang
Summary: Through introducing a negative coupling coefficient, type-I Weyl points have been successfully realized in photonic crystals, presenting a novel strategy for constructing topologically protected photonic systems and demonstrating the characteristics of surface states.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2021)
Review
Physics, Applied
Fuhao Yu, Zhaobang Zeng, Xiang Ji, Kaifei Tang, Yu Xin, Guihan Wu, Dun Mao, Tingyi Gu, Qingzhong Huang, Wei Jiang
Summary: This paper reviews the progress of electro-optic modulators composed of silicon-based microscopic photonic structures. The basic principles, device structures, and advanced modulation capability of different geometric types are detailed for micro-ring modulators, photonic crystal modulators, and other related modulators. The article discusses the impacts of these modulators on speed, power consumption, and thermal stabilities, as well as the challenges, further directions, and emerging possibilities for microscopic photonic structure-based silicon modulators.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Gandhi Alagappan, Ching Eng Png
Summary: This article applies deep learning-accelerated inverse design algorithms to discover a spectrum of photonic power dividers with exceptional performance metrics. The deep learning models exhibit high precision for both TE and TM polarizations of light. These models enable ultrafast search for a subspace that simultaneously satisfies compact footprints, ultralow losses, ultrawide bandwidth, and exceptional robustness against fabrication randomness.
Article
Optics
Hai-Xiao Wang, Yige Chen, Guang-Yu Guo, Hae-Young Kee, Jian-Hua Jiang
Summary: The study reveals that woodpile photonic crystals commonly used in optical frequency applications possess fermion-like relativistic degeneracies, and deforming the crystal shape can lead to the emergence of type-II Dirac points. These findings are of significant importance for 3D optical Dirac physics in all-dielectric photonic crystals.
Article
Chemistry, Multidisciplinary
Jada Ravi, Avulu Vinod Kumar, Durga Prasad Karothu, Mari Annadhasan, Pance Naumov, Rajadurai Chandrasekar
Summary: This study describes the construction of silicon-free, all-organic photonic integrated circuits by micromanipulation of two mechanically different organic crystals with complementary optical properties. The results show the infinite structural variations in optical microstructures that can be achieved using organic crystals, highlighting the untapped potential for lightweight all-organic optical minicircuitry with deformable light-transducive crystals.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Physics, Multidisciplinary
Wancong Li, Qiang Zhou, Pu Zhang, Xue-Wen Chen
Summary: This study proposes the concept of nanoscopic electron reservoir (NER) for direct electro plasmonic and electro-optic modulation. By exploiting the nonclassical effects of conduction electrons, highly electrically susceptible NERs are constructed and achieve pronounced direct electrical tuning of the plasmon mode. Moreover, the electro-plasmonic tuning can be efficiently translated into modulation of optical scattering.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Jinyu Hu, Yue Wang, Jiebin Niu, Chong Wang, Tao Liu, Lina Shi, Yongliang Zhang, Yang Xia, Kai Chang
Summary: Topological protection in photonics offers new prospects for confining and guiding light waves. For the first time, dual-polarization topological edge states are experimentally demonstrated on the silicon-on-insulator platform at optical frequencies. The topological edge states are directly observed by imaging the near fields with scattering scanning near-field optical microscopy.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Tianwei Wu, Yankun Li, Xilin Feng, Shuang Wu, Zihe Gao, Liang Feng
Summary: Far-field optical beam steering is achieved by conveniently tuning the wavelength of nonmechanical optical phased arrays. However, the dispersion of the waveguide and in-line backscattering on-chip limit the efficiency and accuracy of beam steering. To overcome these limitations, a robust and back-reflection-free topological photonic integrated circuit is proposed, where different functionalities are defined by the strategic arrangements of lattices with different topological modulations controlled by a single lattice deformation parameter. By applying an extra band flattening, far-field steering with high wavelength sensitivity is achieved.
Review
Optics
Arash Ahmadivand, Burak Gerislioglu
Summary: The text discusses the development of photonic biosensors and their applications in detecting biomarkers and diseases, as well as the use of metamaterials in photonic biosensors and emerging technologies in the modern pharmaceutical industry.
LASER & PHOTONICS REVIEWS
(2022)
Article
Nanoscience & Nanotechnology
Zhonghe Liu, Yudong Chen, Xiaochen Ge, Weidong Zhou
Summary: This paper presents a novel design of suspended arrays of PCNB cavities with lateral fins, which can be tuned for desired performance by controlling the alignment position of the fins. The proposed cavities are advantageous for energy efficient and ultra-compact photonics devices.
Article
Optics
Weiqiang Xie, Peter Verheyen, Marianna Pantouvaki, Joris Van Campenhout, Dries Van Thourhout
Summary: This work demonstrates ultrahigh-Q one-dimensional (1D) PhC nanocavities fabricated on a 300 mm silicon-on-insulator wafer, with a record Q factor of up to 0.84 million. Efficient mode management is shown by coupling them with an access waveguide, allowing both single-wavelength and multi-wavelength operation over a broad wavelength range (>100 nm).
LASER & PHOTONICS REVIEWS
(2021)
