Welcome to Guangjiang's webpage

About me

I am working on the radio frequency physics and design of particle accelerators for the Electron-Ion Collider (EIC) project at Brookhaven National Laboratory (BNL) including superconductive RF cavities for electron storage ring, componnets for crab cavites and fast frequency tunner of normal conductive cavities for electron beam cooling. From August 2021 to May 2024, I worked in Richard Temkin's group at the Plasma Science and Fusion Center (PSFC) at MIT studying THz gyrotron amplifiers, laser-driven semiconductor switches for THz resonator rings, temperature-dependent permitivity of zirocnia by VNA with THz extenders and the design of THz coupling in the zirconia probe for Dynamic Nuclear Polarization-Nuclear Magnetic Resonance (DNP-NMR). In August 2021, I completed my PhD in Lyubov Titova's group at Worcester Polytechnic Institute, where I focused on photoinduced carrier dynamics in 2D materials (MXenes) and solar energy materials using time-resolved terahertz spectroscopy. Outside of the lab, I enjoy swimming and astro-landscape photography.

News

[05/2024] Joined BNL

[09/2023] Presented a poster on IRMMW-THz 2023 conference at Montreal, Canada

[04/2023] Our paper was accepted by IEEE Transactions on Terahertz Science and Technology

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[08/2022] Presented on IRMMW-THz 2022 conference

[04/2022] Attended IVEC conference at Monterey, CA

[08/2021] Started work as postdoctoral associate at MIT

[06/2021] Successfullly denfended my PhD dissertation at WPI

[12/2020] Our paper was featured on the : inside front cover of Advanced Photonic Research,

Selected Publications [Full List]

Design and optimization of THz coupling in zirconia MAS rotors for dynamic nuclear polarization NMR
Guangjiang Li, Blake Dastrup, Ravi S. Palani, Michael A. Shapiro, Sudheer K. Jawla, Robert G. Griffin, Keith A. Nelson, R. J. Temkin
Journal of Magnetic Resonance , 2024

Measurement of Time Dependent Reflection, Transmission and Absorption in Laser Driven Silicon and GaAs Switches for 250 GHz Radiation
Guangjiang Li, Elliot L. Claveau, Sudheer K. Jawla, Samuel C. Schaub, Michael A. Shapiro, and R. J. Temkin
IEEE Transactions on Terahertz Science and Technology , 2023

Dynamical control over terahertz electromagnetic interference shielding with 2D Ti3C2Ty MXene by ultrafast optical pulses
Guangjiang Li*, Naaman Amer*, Hassan Hafez, Dmitry Turchinovich,Vadym N Mochalin, Frank A Hegmann, Lyubov V Titova (* Co-first)
Nano Letters, 2020, [PDF], [Supporting Info]

Equilibrium and non-equilibrium free carrier dynamics in two-dimensional Ti3C2Tx MXenes: THz spectroscopy study
Guangjiang Li, Kateryna Kushnir, Yongchang Dong, Sergii Chertopalov,Apparao M Rao, Vadym Mochalin, Ramakrishna Podila, Lyubov Titova
2D materials, 2018, [PDF],

Two-dimensional Mxenes Mo2Ti2C3Tz and Mo2TiC2Tz: microscopic conductivity and dynamics of photoexcited carriers
Guangjiang Li*, Varun Natu*, Teng Shi,Michel W Barsoum, Lyubov V Titova (* Co-first)
ACS Applied Energy Materials, 2020, [PDF],

Terahertz Polarizers Based on 2D Ti3C2Tz MXene: Spin Cast from Aqueous Suspensions
Guangjiang Li*, Kiana Montazeri*, Mostafa K Ismail, Michel W Barsoum, Bahram Nabet, Lyubov V Titova (* Co-first)
Advanced Photonics Research, 2020, [PDF],

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Ultrafast Zero-bias Surface Photocurrent in Germanium Selenide: Promise for Terahertz Devices and Photovoltaics
Kateryna Kushnir, Ying Qin, Yuxia Shen, Guangjiang Li, Benjamin M. Fregoso, Sefaattin Tongay, Lyubov V Titova
ACS applied materials & interfaces, 2019, [PDF],

Generation of nanosecond THz pulses using a high gain ring resonator with a semiconductor switch
J. Genoud, E. L. Claveau, S. K. Jawla, G. Li, J. F. Picard, M. A. Shapiro, R. J. Temkin
Applied Physics Letters, 2022, [PDF],

Conference presentations

Talk: Measurement of Time Dependent Reflection, Transmission and Absorption in a Laser Driven Switch for 250 GHz Radiation, 2022 IRMMW-THz, Amsterdan, Netherland(Online)

Talk: A Novel THz Electromagnetic Interference Shielding Material: 2D Ti3C2Ty MXene, 2020 IRMMW-THz, Buffalo, NY(Online)

Talk: Microscopic conductivity and ultrafast carrier dynamics in molybdenum-based MXenes: THz spectroscopy study, 2020 Photonics West, San Francisco, CA

Talk: Long-lived negative THz photoconductivity in Ti3C2Tx MXene thin F

Poster: Design of a 250 GHz Zirconia probe for DNP NMR at 79 K, 2023 IRMMW_THz, Montreal, Canada

Poster: Free Carrier Dynamics in Two-Dimensional Ti3C2Tx MXenes: THz Spectroscopy Study, 2019 OTST (Optical Terahertz Science and Technology), Santa Fe, NM

Poster: Zero-Valent Cu and Sn Intercalation into GeS Nanoribbons—Tailoring Ultrafast Photoconductive Response, 2018 MRS, Boston, MA

Poster: Equilibrium and non-equilibrium free carrier dynamics in 2D Ti3C2Tx MXenes: THz spectroscopy study, 2017 MRS (Materials Research Society), Boston, MA

Leadership, Volunteer, and Awards

Manager of the executive board of USTC Boston Alumni Association, 2021, 2022.

Social program director in Graduate Student Government in WPI, 2020.

Volunteer in the 7th U.S. Department of Energy Solar Decathlon, 2013.

WPI Alex F. Backlin Fund Scholarship, 2021.

WPI Physics department graduate student research award, 2020.

WPI Ph.D. graduate global research experience award, 2018.

Academic Services

Journal reviewer:

Nanoscale - The Royal Society of Chemistry
Applied Physical Letters- American Institute of Physics
Optics Express - Optica Publishing Group
Applied Optics - Optica Publishing Group
IEEE Transactions on Plasma Science
IEEE Transactions on Terahertz Science and Technology
International Journal of Numerical Modelling Electronic Networks, Devices and fields
MDPI Photonics | MDPI materials |MDPI sensors

Teaching

Duties at various times have included: weekly physics lab exercises, office hours, grading homework and exam papers.

Teaching assistant, PH 1120. General Physics-Electricity And Magnetism, 2021

Teaching assistant, PH 1140. Oscillations, And Waves, 2020

Teaching assistant, PH 350X. Optical Properties Of Solids, 2020

Teaching assistant, PH 1110. General Physics-Mechanics, 2019

Photos