Sudip Shekhar
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View article: Dynamic beam-stabilized, additive-printed flexible antenna arrays with on-chip rapid insight generation
Dynamic beam-stabilized, additive-printed flexible antenna arrays with on-chip rapid insight generation Open
Conformal phased arrays promise shape-changing properties, multiple degrees of freedom in the scan angle, and applications for edge computing, including devices for wearable, airborne, and seaborne platforms. However, they have suffered fr…
View article: GHz-rate optical phase shift in light-matter interaction-engineered, silicon-ferroelectric nematic liquid crystals
GHz-rate optical phase shift in light-matter interaction-engineered, silicon-ferroelectric nematic liquid crystals Open
View article: Toward in-sensor imaging classification enabled by on-chip all-optical modulation and photonic neural networks
Toward in-sensor imaging classification enabled by on-chip all-optical modulation and photonic neural networks Open
Image sensors play a crucial role in autonomous driving and security. However, the separation of sensors and processors results in large amounts of redundant data being exchanged between sensory terminals and computing units. Here, leverag…
View article: Dynamic Beam-Stabilized, Additive-Printed Flexible Antenna Arrays with On-Chip Rapid Insight Generation
Dynamic Beam-Stabilized, Additive-Printed Flexible Antenna Arrays with On-Chip Rapid Insight Generation Open
Conformal phased arrays promise shape-changing properties, multiple degrees of freedom to the scan angle, and novel applications in wearables, aerospace, defense, vehicles, and ships. However, they have suffered from two critical limitatio…
View article: Resonating with replicability: factors shaping assay yield and variability in microfluidics-integrated silicon photonic biosensors
Resonating with replicability: factors shaping assay yield and variability in microfluidics-integrated silicon photonic biosensors Open
A detailed quantification of sensor-, microfluidic channel-, and assay-level variability is presented for a microfluidics-integrated silicon photonic biosensor.
View article: On-chip resonance peak extraction in evanescent field silicon photonic biosensors
On-chip resonance peak extraction in evanescent field silicon photonic biosensors Open
Micro ring resonators (MRR) based evanescent field biosensors have shown excellent potential in medical diagnostics due to their performance, scalability, and ability to integrate multiple sensors in a small area to detect various biomarke…
View article: Cryogenic optical-to-microwave conversion using Si photonic integrated circuit Ge photodiodes
Cryogenic optical-to-microwave conversion using Si photonic integrated circuit Ge photodiodes Open
Integrated circuit technology enables the scaling of circuit complexity and functionality while maintaining manufacturability and reliability. Integration is expected to play an important role in quantum information technologies, including…
View article: Cryogenic Optical-to-Microwave Conversion Using Si Photonic Integrated Circuit Ge Photodiodes
Cryogenic Optical-to-Microwave Conversion Using Si Photonic Integrated Circuit Ge Photodiodes Open
Integrated circuit technology enables the scaling of circuit complexity and functionality while maintaining manufacturability and reliability. Integration is expected to play an important role in quantum information technologies, including…
View article: 120 GOPS Photonic tensor core in thin-film lithium niobate for inference and in situ training
120 GOPS Photonic tensor core in thin-film lithium niobate for inference and in situ training Open
View article: An integrated evanescent-field biosensor in silicon
An integrated evanescent-field biosensor in silicon Open
Decentralized diagnostic testing that is accurate, portable, quantitative, and capable of making multiple simultaneous measurements of different biomarkers at the point-of-need remains an important unmet need in the post-pandemic world. Re…
View article: High-Q Slow-Wave Coplanar Waveguides
High-Q Slow-Wave Coplanar Waveguides Open
A comprehensive study of methods of maximizing Q for slow-wave coplanar waveguides is described. In addition to the widths of the signal conductor and coplanar ground lines and the distance between them, the length, spacing and stacking of…
View article: Enabling data-driven and bidirectional model development in Verilog-A for photonic devices
Enabling data-driven and bidirectional model development in Verilog-A for photonic devices Open
We present a method to model photonic components in Verilog-A by introducing bidirectional signaling through a single port. To achieve this, the concept of power waves and scattering parameters from electromagnetism are employed. As a cons…
View article: Dynamic Beam-Stabilized, Additive-Printed Flexible Antenna Arrays with On-Chip Rapid Insight Generation
Dynamic Beam-Stabilized, Additive-Printed Flexible Antenna Arrays with On-Chip Rapid Insight Generation Open
Conformal phased arrays promise shape-changing properties, multiple degrees of freedom to the scan angle, and novel applications in wearables, aerospace, defense, vehicles, and ships. However, they have suffered from two critical limitatio…
View article: Physics to system-level modeling of silicon-organic-hybrid nanophotonic devices
Physics to system-level modeling of silicon-organic-hybrid nanophotonic devices Open
View article: GHz-rate optical phase shift in light matter interaction-engineered, silicon-ferroelectric nematic liquid crystals
GHz-rate optical phase shift in light matter interaction-engineered, silicon-ferroelectric nematic liquid crystals Open
Organic electro-optic materials have demonstrated promising performance in developing electro-optic phase shifters. Their integration with other silicon photonic processes, nanofabrication complexities, and durability remains to be develop…
View article: Enabling data-driven and bidirectional model development in Verilog-A for photonic devices
Enabling data-driven and bidirectional model development in Verilog-A for photonic devices Open
We present a method to model photonic components in Verilog-A by introducing bidirectional signaling through a single port. To achieve this, the concept of power waves and scattering parameters from electromagnetism are employed. As a cons…
View article: Neuromorphic Photonic Computing with an Electro-Optic Analog Memory
Neuromorphic Photonic Computing with an Electro-Optic Analog Memory Open
Artificial intelligence (AI) has seen remarkable advancements across various domains, including natural language processing, computer vision, autonomous vehicles, and biology. However, the rapid expansion of AI technologies has escalated t…
View article: Roadmapping the next generation of silicon photonics
Roadmapping the next generation of silicon photonics Open
Silicon photonics has developed into a mainstream technology driven by advances in optical communications. The current generation has led to a proliferation of integrated photonic devices from thousands to millions-mainly in the form of co…
View article: Physics to System-level Modeling of Silicon-organic-hybrid Nanophotonic Devices
Physics to System-level Modeling of Silicon-organic-hybrid Nanophotonic Devices Open
The continuous growth in data volume has sparked interest in silicon-organic-hybrid nanophotonic devices integrated into silicon photonic integrated circuits (PICs). SOH devices offer improved speed and energy efficiency compared to silico…
View article: On-chip hybrid integration of swept frequency distributed-feedback laser with silicon photonic circuits using photonic wire bonding
On-chip hybrid integration of swept frequency distributed-feedback laser with silicon photonic circuits using photonic wire bonding Open
This paper presents a novel co-packaging approach through on-chip hybrid laser integration with photonic circuits using photonic wire bonding. The process involves die-bonding a low-cost semiconductor distributed-feedback (DFB) laser into …
View article: 120 GOPS Photonic Tensor Core in Thin-film Lithium Niobate for Inference and in-situ Training
120 GOPS Photonic Tensor Core in Thin-film Lithium Niobate for Inference and in-situ Training Open
Photonics offers a transformative approach to artificial intelligence (AI) and neuromorphic computing by enabling low-latency, high-speed, and energy-efficient computations. However, conventional photonic tensor cores face significant chal…
View article: Fully-integrated photonic tensor core for image convolutions
Fully-integrated photonic tensor core for image convolutions Open
Convolutions are one of the most critical signal and image processing operations. From spectral analysis to computer vision, convolutional filtering is often related to spatial information processing involving neighbourhood operations. As …
View article: Roadmapping the Next Generation of Silicon Photonics
Roadmapping the Next Generation of Silicon Photonics Open
Silicon photonics has developed into a mainstream technology driven by advances in optical communications. The current generation has led to a proliferation of integrated photonic devices from thousands to millions - mainly in the form of …
View article: Session 13 Overview: Ideas for the Future: Technology Directions Subcommittee
Session 13 Overview: Ideas for the Future: Technology Directions Subcommittee Open
This session illustrates the scope of what integrated circuits may become in the future.The back-end-of-line (BEOL) hosts 3D memory in 13.1 and dielectric waveguides in 13.5.Signal processing is shown with low-power mixed-signal circuits i…
View article: Cost-effective silicon-photonic biosensors using doped silicon detectors and a broadband source
Cost-effective silicon-photonic biosensors using doped silicon detectors and a broadband source Open
We propose and demonstrate a cost-effective, microring-based, silicon photonic sensor that uses doped silicon detectors and a broadband source. Shifts in the sensing microring resonances are electrically tracked by a doped second microring…
View article: Biofunctionalization of Multiplexed Silicon Photonic Biosensors
Biofunctionalization of Multiplexed Silicon Photonic Biosensors Open
Silicon photonic (SiP) sensors offer a promising platform for robust and low-cost decentralized diagnostics due to their high scalability, low limit of detection, and ability to integrate multiple sensors for multiplexed analyte detection.…
View article: Silicon photonic architecture for training deep neural networks with direct feedback alignment
Silicon photonic architecture for training deep neural networks with direct feedback alignment Open
There has been growing interest in using photonic processors for performing neural network inference operations; however, these networks are currently trained using standard digital electronics. Here, we propose on-chip training of neural …
View article: An Optimization Framework for Silicon Photonic Evanescent-Field Biosensors Using Sub-Wavelength Gratings
An Optimization Framework for Silicon Photonic Evanescent-Field Biosensors Using Sub-Wavelength Gratings Open
Silicon photonic (SiP) evanescent-field biosensors aim to combine the information-rich readouts offered by lab-scale diagnostics, at a significantly lower cost, and with the portability and rapid time to result offered by paper-based assay…
View article: Polymer modulators in silicon photonics: review and projections
Polymer modulators in silicon photonics: review and projections Open
Optical modulators are vital for many applications, including telecommunication, data communication, optical computing, and microwave photonic links. A compact modulator with low voltage drive requirement, low power, high speed, and compat…
View article: Enhanced poling and infiltration for highly efficient electro-optic polymer-based Mach-Zehnder modulators
Enhanced poling and infiltration for highly efficient electro-optic polymer-based Mach-Zehnder modulators Open
An ultra-narrow 40-nm slotted waveguide is fabricated to enable highly efficient, electro-optic polymer modulators. Our measurement results indicate that V π L’s below ∼ 1.19 V.mm are possible for the balanced Mach-Zehnder modulators using…