779 citations · 1.9k across the 20 of their papers we have counts for
20 papers
Simultaneous control of spectral and directional emissivity with gradient epsilon-near-zero InAs photonic structures
Jae Seung Hwang, Jin Xu, Aaswath P. Raman
Controlling both the spectral bandwidth and directional range of emitted thermal radiation is a fundamental challenge in modern photonics and materials research. Recent work has sh…
DeepAdjoint: An All-in-One Photonic Inverse Design Framework Integrating Data-Driven Machine Learning with Optimization Algorithms
Christopher Yeung, Benjamin Pham, Ryan Tsai +2
In recent years, hybrid design strategies combining machine learning (ML) with electromagnetic optimization algorithms have emerged as a new paradigm for the inverse design of phot…
Hybrid Supervised and Reinforcement Learning for the Design and Optimization of Nanophotonic Structures
Christopher Yeung, Benjamin Pham, Zihan Zhang +2
From higher computational efficiency to enabling the discovery of novel and complex structures, deep learning has emerged as a powerful framework for the design and optimization of…
Temporal coupled-mode theory for thermal emission from multiple arbitrarily coupled resonators
Xin Huang, Christopher Yeung, Aaswath P. Raman
Controlling the spectral response of thermal emitters has become increasingly important for a range of energy and sensing applications. Conventional approaches to achieving arbitra…
Enhancing Adjoint Optimization-based Photonics Inverse Design with Explainable Machine Learning
Christopher Yeung, David Ho, Benjamin Pham +2
A fundamental challenge in the design of photonic devices, and electromagnetic structures more generally, is the optimization of their overall architecture to achieve a desired res…
Accurately Quantifying Radiative Cooling Potentials: A Temperature-correction to the Transmittance-based approximation
Jyotirmoy Mandal, Xin Huang, Aaswath P. Raman
Theoretical calculations of the cooling potential of radiative cooling materials are crucial for determining their cooling capability under different meteorological conditions and…
Nanostructured Plasmonic Metal Surfaces as Optical Components for Infrared Imaging and Sensing
Jyotirmoy Mandal, John Brewer, Sagar Mandal +1
Thermal imaging and sensing technologies offer critical information about our thermally radiant world, and in recent years, have seen dramatic increases in usage for a range of app…
Multi-scale photonic emissivity engineering for relativistic lightsail thermal regulation
John Brewer, Matthew F. Campbell, Pawan Kumar +4
The Breakthrough Starshot Initiative aims to send a gram-scale probe to Proxima Centuri B using a laser-accelerated lightsail traveling at relativistic speeds. Thermal management i…
Relativistic light sails need to billow
Matthew F. Campbell, John Brewer, Deep Jariwala +2
We argue that light sails that are rapidly accelerated to relativistic velocities by lasers must be significantly curved in order to reduce their mechanical stresses and avoid tear…
Global Inverse Design Across Multiple Photonic Structure Classes Using Generative Deep Learning
Christopher Yeung, Ryan Tsai, Benjamin Pham +6
Understanding how nano- or micro-scale structures and material properties can be optimally configured to attain specific functionalities remains a fundamental challenge. Photonic m…
Multiplexed Supercell Metasurface Design and Optimization with Tandem Residual Networks
Christopher Yeung, Ju-Ming Tsai, Brian King +5
Complex nanophotonic structures hold the potential to deliver exquisitely tailored optical responses for a range of applications. Metal-insulator-metal (MIM) metasurfaces arranged…
Modeling and optimization of radiative cooling based thermoelectric generators
Bin Zhao, Gang Pei, Aaswath P. Raman
The possibility of night-time power generation has recently stimulated interest in using the radiative sky cooling mechanism with thermoelectric generators (TEG). These passive, lo…
Radiative Cooling and Thermoregulation in the Earth's Glow
Jyotirmoy Mandal, Sagar Mandal, John Brewer +2
Passive radiative cooling involves a net radiative heat loss into the cold outer space through the atmospheric transmission windows. Due to its passive nature and net cooling effec…
Broadband directional control of thermal emission
Jin Xu, Jyotirmoy Mandal, Aaswath P. Raman
Controlling the directionality of emitted far-field thermal radiation is a fundamental challenge in contemporary photonics and materials research. While photonic strategies have en…
Elucidating the Behavior of Nanophotonic Structures Through Explainable Machine Learning Algorithms
Christopher Yeung, Ju-Ming Tsai, Brian King +3
A central challenge in the development of nanophotonic structures is identifying the optimal design for a target functionality, and understanding the physical mechanisms that enabl…
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…
Exceptional contours and band structure design in parity-time symmetric photonic crystals
Alexander Cerjan, Aaswath Raman, Shanhui Fan
We investigate the properties of multidimensional parity-time symmetric periodic systems whose non-Hermitian periodicity is an integer multiple of the underlying Hermitian system's…
Perturbation Theory for Plasmonic Modulation and Sensing
Aaswath Raman, Shanhui Fan
We develop a general perturbation theory to treat small parameter changes in dispersive plasmonic nanostructures and metamaterials. We specifically apply it to dielectric refractiv…
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…
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…