Alexander Sergienko

About

Alexander Sergienko is an Affiliate Faculty member at Boston University, serving as a Professor in the College of Engineering and the Department of Electrical and Computer Engineering. His research focuses on the broad field of quantum science, encompassing quantum physics, quantum engineering, and quantum technology. Specifically, he investigates quantum information, quantum communication and cryptography, quantum networking, and linear-optical quantum computing. His work also involves the manipulation of quantum information in high-dimensional Hilbert spaces through coding, group theory, and topological structures, as well as using simple quantum circuits to simulate complex physical systems. Additionally, Sergienko's research includes ultra-precise optical measurement techniques in science and technology, such as Quantum Metrology, and the characterization of biological, organic, polymer, and semiconductor structures. He holds a Ph.D. and an M.S. in Physics from Moscow State University and has been recognized for his excellence in teaching with the BU College of Engineering Award in 2001. His contributions to the field have been acknowledged through awards such as the NSF CAREER Award in 1999, and he has been featured in BU Today for his work.

Research topics

• Physics
• Optoelectronics
• Computer Science
• Materials science
• Optics
• Quantum mechanics
• Statistical physics

Selected publications

• Plasmonic loss-mitigating broadband adiabatic polarizing beam splitter

  Optics Letters · 2021 · 23 citations

  The intriguing analogy between quantum physics and optics has inspired the design of unconventional integrated photonics devices. In this paper, we numerically demonstrate a broadband integrated polarization beam splitter (PBS) by implementing the stimulated Raman adiabatic passage (STIRAP) technique in a three-waveguide plasmonic system. Our proposed PBS exhibits >250 nm transverse-magnetic (TM) bandwidth with <-40 dB extinction and >150 nm transverse-electric (TE) bandwidth with <-20 dB extinc…

  DOI

• Tunable polarization mode conversion using thin-film lithium niobate ridge waveguide

  Optics Express · 2021 · 22 citations

  Lithium niobate on insulator (LNOI) waveguides, as an emerging technology, have proven to offer a promising platform for integrated optics, due to their strong optical confinement comparable to silicon on insulator (SOI) waveguides, while possessing the versatile properties of lithium niobate, such as high electro-optic coefficients. In this paper, we show that mode hybridization, a phenomenon widely found in vertically asymmetric waveguides, can be efficiently modulated in an LNOI ridge wavegui…

  DOI

• Quantum-clustered two-photon walks

  Physical review. A/Physical review, A · 2020 · 20 citations

  Senior authorCorresponding

  We demonstrate a previously unknown two-photon effect in a discrete-time quantum walk. Two identical bosons with no mutual interactions nonetheless can remain clustered together as they walk on a lattice of directionally reversible optical four-ports acting as Grover coins; both photons move in the same direction at each step due to a two-photon quantum interference phenomenon reminiscent of the Hong-Ou-Mandel effect. The clustered two-photon amplitude splits into two localized parts, one oscill…

  DOI

• Integrating deep convolutional surrogate solvers and particle swarm optimization for efficient inverse design of plasmonic patch nanoantennas

  Nanophotonics · 2024-08-02 · 10 citations

  articleOpen access

  Abstract Plasmonic nanoantennas with suitable far‐field characteristics are of huge interest for utilization in optical wireless links, inter‐/intrachip communications, LiDARs, and photonic integrated circuits due to their exceptional modal confinement. Despite its success in shaping robust antenna design theories in radio frequency and millimeter‐wave regimes, conventional transmission line theory finds its validity diminished in the optical frequencies, leading to a noticeable void in a genera…

  PublisherOA PDFDOI

• Role of photonic angular momentum in all-optical magnetic switching

  Physical review. B./Physical review. B · 2024-04-09 · 8 citations

  article

  By examining the complex interactions between light and magnetism, this work uncovers the dominant role played by light's spin angular momentum in magnetic all-optical switching (AOS) using Co/Pt ferromagnetic thin films. The authors use femtosecond vortex beams to demonstrate that the topological charge and orbital angular momentum's handedness are inconsequential. As a result, this research enhances our comprehension and underscores the pivotal correlation between the angular momentum of light…

  PublisherDOI

Recent grants

• ITR - Integrated Source of High-fidelity Entangled States for Quantum Information Processing

  NSF · $160k · 2003–2007

• Attosecond-resolution quantum interferometry - quantum measurement for telecommunication and science

  NSF · $289k · 2013–2017

Frequent coauthors

• David S. Simon

  149 shared

• Bahaa E. A. Saleh

  109 shared

• Malvin C. Teich

  Boston University

  106 shared

• Olga Minaeva

  37 shared

• Giovanni Di Giuseppe

  Università di Camerino

  31 shared

• Gregg Jaeger

  Boston University

  31 shared

• Shuto Osawa

  Photonics (United States)

  29 shared

• Mete Atatüre

  29 shared

Awards & honors

• BU College of Engineering Award for Excellence in Teaching (…
• Fellow, Optical Society of America
• NSF CAREER Award (1999)

Similar researchers at Boston University

• Ed Kearnsh-122
• Robert Careyh-110
• Lawrence R. Sulakh-107