Author
Ryan Kowalski and Levi Hoogendoorn gave Poster presentations at MRS spring!
Apr. 14, 2023—Ryan Kowalski and Levi Hoogendoorn gave Poster presentations at MRS spring 2023 at San Francisco!
Check out our new collaborative work with Justus Ndukaife’s group!
Oct. 12, 2022—Our recent collaborative work with Justus Ndukaife’s group demonstrates a novel approach to engineering quasi-bound states in the continuum (quasi-BIC) by introducing slots into a zigzag array of elliptical silicon resonators. The electric field intensity enhancement near the apex and the quality factor of the quasi-BIC resonance are both increased. The demonstration holds enormous potential in partial trapping, sensing,...
Check out our Perspective paper on ACS Photonics!
Mar. 14, 2022—Take a look at the recent Perspective paper on ACS Photonics! We introduced the physics and theories of anisotropic polaritons, reviewed the recent progress, and moved on to a discussion of outstanding challenges and potentials in this field. This is a collaborative work with Prof. Thomas G. Folland at The University of Iowa, Jiahua Duan and Prof. Pablo...
Check out our phonon engineering of boron nitride!
Nov. 10, 2021—Our recent work on isotopically engineered boron nitride was just published in Journal of Materials Research! With isotopic engineering, the phonon frequencies as well phonon lifetimes can be modified. While the lighter atoms (10-B) shift the phonon frequencies to higher values, the heavier atoms (11-B) red-shifts the phonon frequency. As such, the phonon polaritons supported by hexagonal and...
Check out our new paper on hyperlens!
Oct. 21, 2021—Our recent work on hyperlens was just published in Nano Letters! With isotopically enriched hBN, the resolution of the system is increased significantly compared with the natural form. More importantly, to correlate the complicated hyperlens field with the objects underneath, we developed an algorithm to retrieve the convoluted images. The work is in collaboration with...
Check out our inverse design work on Tamm plasmon thermal emitters!
Oct. 21, 2021—Our recent work on inversely designed Tamm plasma polariton thermal emitters was just published in Nature Materials, and it is also on the research news of the School of Engineering! With stochastic gradient descent, we are able to inversely design the Tamm plasma devices with numerous changeable parameters within several minutes on a consumer-grade desktop. Additionally,...
Check out our recent work on guided mid-and near-IR paper!
Mar. 4, 2021—Our recent work on guided mid- and near-IR light in a hybrid system just published in Advanced Materials, and it is also on the research news of the School of Engineering! With hyperbolic phonon polaritons supported by hexagonal boron nitride, the mid-IR light is confined to a small length scale, and guided along a silicon waveguide underneath...