Publications (47)
Enhancement of Quantum Excitation Transport by Photonic Nonreciprocity
S. Ali Hassani Gangaraj, Lei Ying, Francesco Monticone +1
Enhanced interaction between two two-level emitters (e.g., atoms) by nonreciprocal photonic media can be of benefit to broad areas, from quantum information science to biological d…
Atomically Thin Optical Lenses and Gratings
Jiong Yang, Zhu Wang, Fan Wang +8
Two-dimensional (2D) materials have emerged as promising candidates for miniaturized optoelectronic devices, due to their strong inelastic interactions with light. On the other han…
Graded nanocomposite metamaterials for a double-sided radiative cooling architecture with a record breaking cooling power density
Lyu Zhou, Haomin Song, Nan Zhang +6
As an emerging electricity-free cooling technology, radiative cooling employs outer space as the heat sink. With this, a sky-facing thermal emitter is usually required. Due to the…
Accelerating vapor condensation with daytime radiative cooling
Ming Zhou, Haomin Song, Xingyu Xu +8
Vapor condensation plays a crucial role in solar water-purification technologies. Conventional condensers in solar water-purification systems do not provide sufficient cooling powe…
High-efficiency and low-jitter Silicon single-photon avalanche diodes based on nanophotonic absorption enhancement
Jian Ma, Ming Zhou, Zongfu Yu +8
Silicon single-photon avalanche diode (SPAD) is a core device for single-photon detection in the visible and the near-infrared range, and widely used in many applications. However,…
Direct Object Recognition Without Line-of-Sight Using Optical Coherence
Xin Lei, Liangyu He, Yixuan Tan +5
Visual object recognition under situations in which the direct line-of-sight is blocked, such as when it is occluded around the corner, is of practical importance in a wide range o…
Maglev-Pentabot: Magnetic Levitation System for Non-Contact Manipulation using Deep Reinforcement Learning
Guoming Huang, Qingyi Zhou, Dianjing Liu +3
Non-contact manipulation has emerged as a transformative approach across various industrial fields. However, current flexible 2D and 3D non-contact manipulation techniques are ofte…
Inverse design of dielectric metasurface by spatial coupled mode theory
Zhicheng Wu, Xiaoyan Huang, Nanfang Yu +1
Modeling metasurfaces with high accuracy and efficiency is challenging because they have features smaller than the wavelength but sizes much larger than the wavelength. Full wave s…
DogWeave: High-Fidelity 3D Canine Reconstruction from a Single Image via Normal Fusion and Conditional Inpainting
Shufan Sun, Chenchen Wang, Zongfu Yu
Monocular 3D animal reconstruction is challenging due to complex articulation, self-occlusion, and fine-scale details such as fur. Existing methods often produce distorted geometry…
Limits on Broadband Absorption Enhancement in the Presence of Multiple Lossy Materials
Aaswath Raman, Zongfu Yu, Shanhui Fan
Enhancing the absorption and emission of electromagnetic waves over a broad range of wavelengths is a topic of fundamental and applied interest in photonics and energy research. In…
Real-Space Imaging of Guided Exciton Polaritons in Free-standing Monolayer WSe2
Manuka Suriyage, Hao Qin, Xueqian Sun +5
Monolayers of transition metal dichalcogenides (TMDCs), known for their strong excitonic states with high binding energies in the visible spectrum at room temperature, offer great…
Fundamental Limit of Nanophotonic Light-trapping in Solar Cells
Zongfu Yu, Aaswath Raman, Shanhui Fan
Establishing the fundamental limit of nanophotonic light-trapping schemes is of paramount importance and is becoming increasingly urgent for current solar cell research. The standa…
Unambiguous identification of monolayer phosphorene by phase-shifting interferometry
Jiong Yang, Renjing Xu, Jiajie Pei +6
Monolayer phosphorene provides a unique two-dimensional (2D) platform to investigate the fundamental many-body interactions. However, owing to its high instability, unambiguous ide…
Multi-refractive-index metamaterials based on subwavelength waveguide arrays
Zhaoning Yu, Chenghao Wan, Jad Salman +4
We demonstrate a metamaterial that cannot be described by a single set of refractive-index and impedance values, even for fixed frequency and polarization. The metamaterial structu…
Angular constraint on light-trapping absorption enhancement in solar cells
Zongfu Yu, Shanhui Fan
Light trapping for solar cells can reduce production cost and improve energy conversion efficiency. Understanding some of the basic theoretical constraints on light trapping is the…
Mapping local optical densities of states in silicon photonic structures with nanoscale electron spectroscopy
Judy J. Cha, Zongfu Yu, Eric Smith +3
Relativistic electrons in a structured medium generate radiative losses such as Cherenkov and transition radiation that act as a virtual light source, coupling to the photonic dens…
Training deep neural networks for the inverse design of nanophotonic structures
Dianjing Liu, Yixuan Tan, Erfan Khoram +1
Data inconsistency leads to a slow training process when deep neural networks are used for the inverse design of photonic devices, an issue that arises from the fundamental propert…
Extraordinarily bound quasi-one-dimensional trions in two-dimensional phosphorene atomic semiconductors
Shuang Zhang, Renjing Xu, Fan Wang +9
The anisotropic nature of the new two-dimensional (2D) material phosphorene, in contrast to other 2D materials such as graphene and transition metal dichalcogenide (TMD) semiconduc…
Electro-optical silicon isolator
Hugo Lira, Zongfu Yu, Shanhui Fan +1
We create a non-magnetic CMOS-compatible optical isolator on a silicon chip. The isolator is based on indirect interband photonic transition, induced by electrically-driven dynamic…
Extraordinary Photoluminescence and Strong Temperature/Angle-Dependent Raman Responses in Few-Layer Phosphorene
Shuang Zhang, Jiong Yang, Renjing Xu +8
Phosphorene is a new family member of two-dimensional materials. We observed strong and highly layer-dependent photoluminescence in few-layer phosphorene (2 to 5 layers). The resul…
Long-Propagating Ghost Phonon Polaritons Enabled by Selective Mode Excitation
Manuka P. Suriyage, Qingyi Zhou, Hao Qin +5
The precise control of phonon polaritons(PhPs) is essential for advancements in nanophotonic applications like on-chip optical communication and quantum information processing. Gho…
Extended range of dipole-dipole interactions in periodically structured photonic media
Lei Ying, Ming Zhou, Michael Mattei +4
The interaction between quantum two-level systems is typically short-range in free space and most photonic environments. Here we show that diminishing momentum isosurfaces with equ…
Neuromorphic Metasurface
Zhicheng Wu, Ming Zhou, Erfan Khoram +2
Metasurfaces have been used to realize optical functions such as focusing and beam steering. They use sub-wavelength nanostructures to control the local amplitude and phase of ligh…
Full-wave nonlinear microscopy reveals guided channel for ultrafast polariton transport
Qingyi Zhou, Piper Fowler-Wright, Zongfu Yu +2
We show how finite-difference time-domain (FDTD) simulations can be extended to model ultrafast nonlinear microscopy, enabling the prediction of spatially-resolved pump--probe sign…
Comment on "Linear and passive silicon optical isolator" in Scientific Reports 2, 674
Alexander Petrov, Dirk Jalas, Manfred Eich +10
Wang et al. [1] demonstrated different power transmission coefficients for forward and backward propagation in simulation and experiment. From such a demonstration, the central cla…
Efficient simulation framework for modeling collective emission in ensembles of inhomogeneous solid-state emitters
Qingyi Zhou, Wenxin Wu, Maryam Zahedian +2
An efficient simulation framework is proposed to model collective emission in disordered ensembles of quantum emitters. Using a cumulant expansion approach, the computational compl…
Compute-first optical detection for noise-resilient visual perception
Jungmin Kim, Nanfang Yu, Zongfu Yu
In the context of visual perception, the optical signal from a scene is transferred into the electronic domain by detectors in the form of image data, which are then processed for…
Optical Tuning of Exciton and Trion Emissions in Monolayer Phosphorene
Jiong Yang, Renjing Xu, Jiajie Pei +6
Monolayer phosphorene provides a unique two-dimensional (2D) platform to investigate the fundamental dynamics of excitons and trions (charged excitons) in reduced dimensions. Howev…
Strong magneto-optical response enabled by quantum two level systems
Lei Ying, Ming Zhou, Xiaoguang Luo +2
The magneto-optical effect breaks time-reversal symmetry, a unique property that makes it indispensable in nonreciprocal optics and topological photonics. Unfortunately, all natura…
Fundamental limit of light trapping in grating structures
Zongfu Yu, Aaswath Raman, Shanhui Fan
We use a rigorous electromagnetic approach to analyze the fundamental limit of light-trapping enhancement in grating structures. This limit can exceed the bulk limit of 4n^2, but h…
Avalanche Sensing via Kerr frequency comb in an Optical Microcavity
Chenchen Wang, Qingyi Zhou, Lan Yang +1
Sensors based on optical microcavities enhance light-matter interactions within an ultraconfined volume, enabling high-sensitivity detection across a wide range of sensing applicat…
Atomic metasurfaces for manipulation of single photons
Ming Zhou, Jingfeng Liu, Mikhail Kats +1
Metasurfaces are an emerging platform for manipulating light on a two-dimensional plane. Existing metasurfaces comprise arrays of optical resonators such as plasmonic antennas or h…
Strong and long-range radiative interaction between resonant transitions
Lei Ying, Michael S. Mattei, Boyuan Liu +3
Enhancing the radiative interaction between quantum electronic transitions is of general interest. There are two important properties of radiative interaction: the range and the st…
Metasurface Smart Glass for Object Recognition
Cheng-Chia Tsai, Xiaoyan Huang, Zhicheng Wu +2
Recent years have seen a considerable surge of research on developing heuristic approaches to realize analog computing using physical waves. Among these, neuromorphic computing usi…
Electromagnetic Scattering Laws in Weyl Systems
Ming Zhou, Lei Ying, Ling Lu +3
Wavelength determines the length scale of the cross section when electromagnetic waves are scattered by an electrically small object. The cross section diverges for resonant scatte…
Nanophotonic Media for Artificial Neural Inference
Erfan Khoram, Ang Chen, Dianjing Liu +4
We show optical waves passing through a nanophotonic medium can perform artificial neural computing. Complex information, is encoded in the wave front of an input light. The medium…
Thermal extraction: enhancing thermal emission of finite size macroscopic blackbody to far-field vacuum
Zongfu Yu, Nicholas Sergeant, Torbjorn Skauli Gang Zhang +2
The understanding of far-field thermal radiation had directly led to the discovery of quantum mechanics a century ago, and is of great current practical importance for applications…
Is one-way modal conversion sufficient for optical isolation
Zongfu Yu, J. D. Joannopoulos, Shanhui Fan
We show that the novel one-way photonic modal conversion effect, as demonstrated by Feng et al (Reports, 11 August, 2011, p. 729), is insufficient in itself to enable optical isola…
Imaging-free object recognition enabled by optical coherence
Yixuan Tan, Xin Lei, Xingze Wang +2
Visual object recognition is one of the most important perception functions for a wide range of intelligent machines. A conventional recognition process begins with forming a clear…
Quantum Nonlinearity for Optical Neural Computing
Qingyi Zhou, Jungmin Kim, Yutian Tao +4
The rapid scaling of deep neural networks comes at the cost of unsustainable power consumption. While optical neural networks offer an alternative, their capabilities remain constr…
Simulating quantum emitters in arbitrary photonic environments using FDTD: beyond the semi-classical regime
Qingyi Zhou, S. Ali Hassani Gangaraj, Ming Zhou +1
We propose a numerical algorithm that integrates quantum two-level systems (TLSs) into the finite-difference time-domain (FDTD) framework for simulating quantum emitters in arbitra…
Sparsity for Ultrafast Material Identification
Yurui Qu, Qingyi Zhou, Jin Xiang +1
Mid-infrared spectroscopy is often used to identify material. Thousands of spectral points are measured in a time-consuming process using expensive table-top instrument. However, m…
Photonic systolic array for all-optical matrix-matrix multiplication
Jungmin Kim, Qingyi Zhou, Zongfu Yu
Systolic arrays have proven to be highly efficient for parallelized matrix-matrix multiplication (MMM), utilizing synchronized, heartbeat-like data flows across an array of process…
Anderson localization of electromagnetic waves in three dimensions
Alexey Yamilov, Sergey E. Skipetrov, Tyler W. Hughes +3
Anderson localization marks a halt of diffusive wave propagation in disordered systems. Despite extensive studies over the past 40 years, Anderson localization of light in three di…
Controlling the Minimal Feature Sizes in Adjoint Optimization of Nanophotonic Devices Using B-spline Surfaces
Erfan Khoram, Xiaoping Qian, Ming Yuan +1
Adjoint optimization is an effective method in the inverse design of nanophotonic devices. In order to ensure the manufacturability, one would like to have control over the minimal…
Beam-controlled spectral-selective architecture with planar polydimethylsiloxane/metal-films for all-day radiative cooling
Lyu Zhou, Haomin Song, Jianwei Liang +9
Radiative cooling is a passive cooling strategy with zero consumption of electricity. Although this technology can work well during optimal atmospheric conditions at nighttime, it…
Quantum scattering theory of Fock states in high-dimensional spaces
Jingfeng Liu, Ming Zhou, Zongfu Yu
A quantum scattering theory is developed for Fock states scattered by two-level systems in the free space. Compared to existing scattering theories that treat incident light semi-c…