Publications by authors named "V J Sorger"
Article Synopsis
- Scientists and engineers have long sought faster and more efficient ways to solve mathematical equations, moving beyond traditional brute-force computing methods that are becoming less effective over time.
- New techniques that take advantage of natural systems' energy minimization, like annealers and Ising Machines, are gaining popularity, with a focus on programmable analog solvers that utilize Maxwell's equations and photonic circuits.
- A novel photonic integrated circuit was developed, demonstrating 90% accuracy compared to commercial solvers, and successfully tested for modeling thermal diffusion on a spacecraft’s heat shield, signaling potential applications in various scientific and engineering areas.
Michelson Interferometric Methods for Full Optical Complex Convolution.
Nanomaterials (Basel)
July 2024
Optical real-time data processing is advancing fields like tensor algebra acceleration, cryptography, and digital holography. This technology offers advantages such as reduced complexity through optical fast Fourier transform and passive dot-product multiplication. In this study, the proposed Reconfigurable Complex Convolution Module (RCCM) is capable of independently modulating both phase and amplitude over two million pixels.
View Article and Find Full Text PDFThe photonic spin Hall effect, referring to the spatial separation of photons with opposite spins due to spin-orbit interactions, has enabled potential for various spin-sensitive applications and devices. Here, using scattering-type near-field scanning optical microscopy, we observe spin-orbit interactions introduced by a subwavelength semiring antenna integrated in a plasmonic circuit. Clear evidence of unidirectional excitation of surface plasmon polaritons is obtained by direct comparison of the amplitude- and phase-resolved near-field maps of the plasmonic nanocircuit under excitation with photons of opposite spin states coupled to a plasmonic nanoantenna.
View Article and Find Full Text PDFPhotonic Random-Access Memories (P-RAM) are an essential component for the on-chip non-von Neumann photonic computing by eliminating optoelectronic conversion losses in data links. Emerging Phase-Change Materials (PCMs) have been showed multilevel memory capability, but demonstrations still yield relatively high optical loss and require cumbersome WRITE-ERASE approaches increasing power consumption and system package challenges. Here we demonstrate a multistate electrically programmed low-loss nonvolatile photonic memory based on a broadband transparent phase-change material (Ge2Sb2Se5, GSSe) with ultralow absorption in the amorphous state.
View Article and Find Full Text PDFArticle Synopsis
- Metalenses are being explored as a more compact and flexible alternative to digital micromirror devices (DMDs), generating excitement in the field of optical engineering.
- The research highlights the use of Sb2Se3 phase-change material for fast, reversible, and non-volatile adjustments in lens focus, specifically aimed at the 1550 nm telecom spectrum.
- A microfabricated device demonstrates rapid tuning capabilities with a switching contrast ratio of 28.7 dB, paving the way for dynamic metalenses suitable for beamforming applications.