205 citations · 540 across the 30 of their papers we have counts for
32 papers
Monolithic Integration of Single Quantum Emitters in hBN Bullseye Cavities
Lesley Spencer, Jake Horder, Sejeong Kim +2
The ability of hexagonal boron nitride to host quantum emitters in the form of deep-level color centers makes it an important material for quantum photonic applications. This work…
Purcell enhancement of a cavity-coupled emitter in hexagonal boron nitride
Johannes E. Fröch, Chi Li, Yongliang Chen +4
Integration of solid state quantum emitters into nanophotonic circuits is a critical step towards fully on-chip quantum photonic based technologies. Among potential materials platf…
Coupling Spin Defects in a Layered Material to Nanoscale Plasmonic Cavities
Noah Mendelson, Ritika Ritika, Mehran Kianinia +11
Spin defects in hexagonal boron nitride, and specifically the negatively charged boron vacancy (VB) centres, are emerging candidates for quantum sensing. However, the VB defects su…
Integration of hBN quantum emitters in monolithically fabricated waveguides
Chi Li, Johannes E. Fröch, Milad Nonahal +4
Hexagonal boron nitride (hBN) is gaining interest for potential applications in integrated quantum nanophotonics. Yet, to establish hBN as an integrated photonic platform several c…
Demonstration of hybrid high-Q hexagonal boron nitride microresonators
Anustup Das, Dong Jun Lee, Prasoon K. Shandilya +9
Hexagonal boron nitride (hBN) is a wide bandgap van der Waals material that is emerging as a powerful platform for quantum optics and nanophotonics. In this work, we demonstrate wh…
Coupling spin defects in hexagonal boron nitride to monolithic bullseye cavities
Johannes E. Fröch, Lesley Spencer, Mehran Kianinia +6
Color centers in hexagonal boron nitride (hBN) are becoming an increasingly important building block for quantum photonic applications. Herein, we demonstrate the efficient couplin…
Fabrication of photonic resonators in bulk 4H-SiC
Otto Cranwell Schaeper, Johannes E. Fröch, Sejeong Kim +4
The design and engineering of photonic architectures, suitable to enhance, collect and guide light on chip is needed for applications in quantum photonics and quantum optomechanics…
Nanofabrication of high Q, transferable, diamond resonators
Blake Regan, Aleksandra Trycz, Johannes E. Fröch +3
Advancement of diamond based photonic circuitry requires robust fabrication protocols of key components, including diamond resonators and cavities. Here, we present 1D (nanobeam) p…
Characterization of single photon sources for radiometry applications at room temperature
Hee-Jin Lim, Dong-Hoon Lee, In-ho Bae +5
A single photon source with high repeatability and low uncertainties is the key element for few-photon metrology based on photon numbers. While low photon number fluctuations and h…
Large few-layer hexagonal boron nitride flakes for nonlinear optics
Nils Bernhardt, Sejeong Kim, Johannes E. Froch +7
Hexagonal boron nitride (hBN) is a layered dielectric material with a wide range of applications in optics and photonics. In this work, we demonstrate a fabrication method for few-…
Grain Dependent Growth of Bright Quantum Emitters in Hexagonal Boron Nitride
Noah Mendelson, Luis Morales, Chi Li +7
Point defects in hexagonal boron nitride have emerged as a promising quantum light source due to their bright and photostable room temperature emission. In this work, we study the…
Valley Polarization Enhancement Induced by a Single Chiral Nanoparticle
Sejeong Kim, Yae Chan Lim, Ryeong Myeong Kim +4
Valley polarization is amongst the most critical attributes of atomically thin materials. However, achieving a high contrast from monolayer transition metal dichalcogenides (TMDs)…
Anapole resonances in low-index materials
Nicholas Joel Damaso, Sejeong Kim
Photonic cavities are valued in current research owing to the multitude of linear and nonlinear effects arising from densely confined light. Cavity designs consisting of low loss d…
Photonic nanobeam cavities with nano-pockets for efficient integration of fluorescent nanoparticles
Johannes E. Fröch, Sejeong Kim, Connor Stewart +5
Integrating fluorescent nanoparticles with high-Q, small mode volume cavities is indispensable for nanophotonics and quantum technologies. To date, nanoparticles have largely been…
Versatile Direct Writing of Dopants in a Solid State Host Through Recoil Implantation
Johannes E. Fröch, Alan Bahm, Mehran Kianinia +8
Modifying material properties at the nanoscale is crucially important for devices in nanoelectronics, nanophotonics and quantum information. Optically active defects in wide band g…
Coupling hBN quantum emitters to 1D photonic crystal cavities
Johannes E. Fröch, Sejeong Kim, Noah Mendelson +3
Quantum photonics technologies require a scalable approach for integration of non-classical light sources with photonic resonators to achieve strong light confinement and enhanceme…
Photonic devices fabricated from (111) oriented single crystal diamond
Blake Regan, Sejeong Kim, Anh Tu Huy Ly +5
Diamond is a material of choice in the pursuit of integrated quantum photonic technologies. So far, the majority of photonic devices fabricated from diamond, are made from (100)-or…
Integrated on chip platform with quantum emitters in layered materials
Sejeong Kim, Ngoc My Hanh Duong, Minh Nguyen +7
Integrated quantum photonic circuitry is an emerging topic that requires efficient coupling of quantum light sources to waveguides and optical resonators. So far, great effort has…
Second-harmonic generation in multilayer hexagonal boron nitride flakes
Sejeong Kim, Johannes E. Fröch, Augustine Gardner +3
We report second-harmonic generation (SHG) from thick hexagonal boron nitride (hBN) flakes with approximately 109-111 layers. The resulting effective second-order susceptibility is…
Fabrication of photonic nanostructures from hexagonal boron nitride
Johannes E. Fröch, Yongsop Hwang, Sejeong Kim +2
Growing interest in devices based on layered van der Waals (vdW) materials is motivating the development of new nanofabrication methods. Hexagonal boron nitride (hBN) is one of the…
Hexagonal boron nitride cavity optomechanics
Prasoon K. Shandilya, Johannes E. Fröch, Matthew Mitchell +7
Hexagonal boron nitride (hBN) is an emerging layered material that plays a key role in a variety of two-dimensional devices, and has potential applications in nanophotonics and nan…
Enhanced Emission from WSe2 Monolayers Coupled to Circular Bragg Gratings
Ngoc My Hanh Duong, Zai-Quan Xu, Mehran Kianinia +8
Two-dimensional transition-metal dichalcogenides (TMDC) are of great interest for on-chip nanophotonics due to their unique optoelectronic properties. Here, we propose and realize…
Single crystal diamond membranes containing germanium vacancy color centers
Kerem Bray, Blake Regan, Aleksandra Trycz +6
Single crystal diamond membranes that host optically active emitters are highly attractive components for integrated quantum nanophotonics. In this work we demonstrate bottom-up sy…
Effects of Fano resonance on optical chirality of planar plasmonic nanodevices
Yongsop Hwang, Seojoo Lee, Sejeong Kim +2
The effects of Fano resonance on the optical chirality of planar plasmonic nanodevices in the visible wavelength range are experimentally observed and theoretically explained. The…