Explanipedia

Research on optimization of surface roughness of aspherical aluminum during Single-Point Diamond Turning using BBK model and PSO algorithm Open

Dao Van Duong, Hung Nguyen Kim Hung, Ngo Van Tuan, Vien Van, Bien Duong Xuan Bien · 2025

The paper presents the results of optimizing the surface quality of aspheric aluminum during Single Point Diamond Turning (SPDT) based on the Box-Behnken Design (BBD) experimental method. The experimental dataset consists of 15 experiments…

Observation of compact localized states in synthetic Floquet-Lieb topological photonic lattices Open

Hanfa Song, Ruoheng Zhang, Vien Van · 2025

Flat bands are unique quantum states in translationally-invariant lattices that are characterized by dispersionless energy bands and compact localized Wannier functions. In static, tight-binding systems, topologically nontrivial and gapped…

Reducing Effect of the Nonlinear Distortion in M-QAM OFDM System by Pilot-Based Automatic Phase Shift Open

Vien Van, Hai Dao Thanh, Binh Nguyen Quoc, Du Dao Huy · 2024

Enhanced Quantum Emission from a Topological Floquet Resonance Open

Shirin Afzal, Tyler J. Zimmerling, Mahdi Rizvandi, Majid Taghavi, Leili Esmaeilifar , et al. · 2024

Entanglement is a valuable resource in quantum information technologies. The practical implementation of entangled photon sources faces obstacles from imperfections and defects inherent in physical systems, resulting in a loss or degradati…

All‐Bands‐Flat Floquet Topological Photonic Insulators with Microring Lattices Open

Hanfa Song, Vien Van · 2024

Topological Photonic Insulators In article number 2400023, Vien Van and Hanfa Song present the design and realization of (2 + 1)D topological photonic insulators hosting all flat bands, which exhibit novel properties such as anomalous Floq…

All‐Bands‐Flat Floquet Topological Photonic Insulators with Microring Lattices Open

Hanfa Song, Vien Van · 2024

Coupled microring lattices are versatile photonic systems that can be used to realize various topological phases of matter. In two‐dimensional (2D) microring lattices, the periodic and unidirectional circulation of light in each microring …

Wide edge state supercontinuum in a Floquet–Lieb topological photonic insulator Open

Hanfa Song, Tyler J. Zimmerling, Bo Leng, Vien Van · 2023

Conventional topological photonic insulators typically have narrow nontrivial band gaps truncated by broad dispersive bulk bands, resulting in limited edge mode transmission bandwidths that can be exploited for potential applications. Here…

Bright quantum photon sources from a topological Floquet resonance Open

Shabir Barzanjeh, Shirin Afzal, Tyler J. Zimmerling, Mahdi Rizvandi, M. Hossein Taghavi , et al. · 2023

Entanglement, a fundamental concept in quantum mechanics, plays a crucial role as a valuable resource in quantum technologies. The practical implementation of entangled photon sources encounters obstacles arising from imperfections and def…

Enhanced quantum emission from a topological Floquet resonance Open

Shirin Afzal, Tyler J. Zimmerling, Mahdi Rizvandi, M. Hossein Taghavi, Taras Hrushevskyi , et al. · 2023

Entanglement is a valuable resource in quantum information technologies. The practical implementation of entangled photon sources faces obstacles from imperfections and defects inherent in physical systems, resulting in a loss or degradati…

Robust Programmable Photonic Circuits Based on a Floquet-Lieb Topological Waveguide Lattice Open

Hanfa Song, Tyler J. Zimmerling, Vien Van · 2023

We propose a robust programmable photonic integrated circuit platform based on a 2D Floquet-Lieb topological lattice. Reconfigurable topological photonic lattices typically require creating topologically distinct domains to guide interface…

Ultrawide Edge State Supercontinuum in a Floquet-Lieb Topological Photonic Insulator Open

Hanfa Song, Tyler J. Zimmerling, Bo Leng, Vien Van · 2023

Conventional topological photonic insulators typically have narrow nontrivial band gaps truncated by broad dispersive bulk bands, resulting in limited edge mode transmission bandwidths that can be exploited for potential applications. Here…

N-band photonic Hopf insulators based on 2D microring lattices Open

Bo Leng, Vien Van · 2022

Hopf insulators are topological insulators whose topological behavior arises from the nontrivial mapping from a 3D sphere to a 2D sphere, known as the Hopf map. The Hopf map, typically encountered in the study of spinor and Skyrmion system…

N-Band Photonic Hopf Insulators Based on 2D Microring Lattices Open

Bo Leng, Vien Van · 2022

Hopf insulators are topological insulators whose topological behavior arises from the nontrivial mapping from a 3D sphere to a 2D sphere, known as the Hopf map. The Hopf map, typically encountered in the study of spinor and skyrmion system…

Broadband Resonance-Enhanced Frequency Generation by Four-Wave Mixing in a Silicon Floquet Topological Photonic Insulator Open

Tyler J. Zimmerling, Shirin Afzal, Vien Van · 2022

Floquet topological photonic insulators, whose light transport properties are dictated by the periodic drive sequence of the lattice, provide more flexibility for controlling and trapping light than undriven topological insulators, which c…

Trapping light in a Floquet topological photonic insulator by Floquet defect mode resonance Open

Shirin Afzal, Vien Van · 2021

Floquet topological photonic insulators characterized by periodically varying Hamiltonians are known to exhibit much richer topological behaviors than static systems. In a Floquet insulator, the phase evolution of the Floquet–Bloch modes p…

Floquet Mode Resonance: Trapping light in the bulk mode of a Floquet topological insulator by quantum self-interference Open

Shirin Afzal, Vien Van · 2021

Floquet topological photonic insulators characterized by periodically-varying Hamiltonians are known to exhibit much richer topological behaviors than static systems. In a Floquet insulator, the phase evolution of the Floquet-Bloch modes p…

Realization of Anomalous Floquet Insulators in Strongly Coupled Nanophotonic Lattices Open

Shirin Afzal, Tyler J. Zimmerling, Yang Ren, David Perron, Vien Van · 2020

We experimentally realized Floquet topological photonic insulators using a square lattice of direct-coupled octagonal resonators. Unlike previously reported topological insulator systems based on microring lattices, the nontrivial topologi…

Large-Scale Optimization With Machine Learning Applications Open

Vien Van · 2019

This thesis aims at developing efficient algorithms for solving some fundamental engineering problems in data science and machine learning. We investigate a variety of acceleration techniques for improving the convergence times of optimiza…

A Continuously Tunable Silicon Double-Microring Filter With Precise Temperature Tracking Open

Yang Ren, David Perron, Fnu Aurangozeb, Zhiping Jiang, Masum Hossain , et al. · 2018

We demonstrate continuous tuning of a second-order silicon microring filter over the full 7.8-nm FSR of the resonators using the thermo-optic effect. Strongly correlated linear relationships between the heater powers and the filter center …

Topological phases and the bulk-edge correspondence in 2D photonic microring resonator lattices Open

Shirin Afzal, Vien Van · 2018

We show that 2D photonic lattices consisting of coupled microring resonators can emulate quantum systems driven by periodic Hamiltonians and can thus be used to realize photonic Floquet topological insulators. By transforming a 2D microrin…

Silicon photonic dual-gas sensor for H_2 and CO_2 detection Open

Guangcan Mi, Cameron Horvath, Vien Van · 2017

We report a silicon photonic dual-gas sensor based on a wavelength-multiplexed microring resonator array for simultaneous detection of H₂ and CO₂ gases. The sensor uses Pd as the sensing layer for H₂ gas an…

Issue Information ‐ TOC Open

N. Henry Moss, J. Daru, Doris Lanz, Shakila Thangaratinam, Khalid S. Khan , et al. · 2017

Recognising endometrial cancer in

Controlling evanescent waves on-chip using all-dielectric metamaterials for dense photonic integration Open

Saman Jahani, Sangsik Kim, Jonathan Atkinson, J. C. Wirth, Farid Kalhor , et al. · 2017

Miniaturization of optical components with low power consumption fabricated using a CMOS foundry process can pave the way for dense photonic integrated circuits within nanoelectronic platforms. However, the large spatial extent of evanesce…

Photonic skin-depth engineering on a silicon chip using all-dielectric metamaterials Open

Saman Jahani, Sangsik Kim, Jonathan Atkinson, J. C. Wirth, Farid Kalhor , et al. · 2017

Postfabrication Phase Error Correction of Silicon Photonic Circuits by Single Femtosecond Laser Pulses Open

Daniel Bachman, Zhijiang Chen, Christopher Wang, R. Fedosejevs, Ying Y. Tsui , et al. · 2016

Phase errors caused by fabrication variations in silicon photonic integrated circuits are an important problem, which negatively impacts device yield and performance. This study reports our recent progress in the development of a method fo…

Silicon microring refractometric sensor for atmospheric CO_2 gas monitoring Open

Guangcan Mi, Cameron Horvath, Mirwais Aktary, Vien Van · 2016

We report a silicon photonic refractometric CO(2) gas sensor operating at room temperature and capable of detecting CO(2) gas at atmospheric concentrations. The sensor uses a novel functional material layer based on a guanidine polymer der…

Negative coupling and coupling phase dispersion in a silicon quadrupole micro-racetrack resonator Open

Daniel Bachman, Alan Tsay, Vien Van · 2015

We report the first experimental study of the effects of coupling phase dispersion on the spectral response of a two-dimensionally coupled quadrupole micro-racetrack resonator. Negative coupling in the system is observed to manifest itself…

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