46 citations · 127 across the 8 of their papers we have counts for
8 papers
Room-temperature THz photon detection via nonlinear upconversion with 2% full-system efficiency
Aswin Vishnuradhan, Wei Cui, Hesam Heydarian +5
Sensitive detection of terahertz (THz) radiation is fundamental to progress in spectroscopy, advanced wireless communication, and the realization of emerging quantum technologies.…
Broadband THz spectroscopy system beyond 25 THz using BNA crystals and a tunable single-ring-fiber compressor
Wei Cui, Aswin Vishnuradhan, Markus Lippl +4
We present a terahertz (THz) time-domain spectroscopy (THz-TDS) system which accesses a broadband spectrum, efficiently covering the so-called "new THz gap" between 5 and 15 THz an…
Characterization of Terahertz Spectral Bands for Next Generation of Wireless Communications
Eeswar Kumar Yalavarthi, Wei Cui, Aswin Vishnuradhan +4
The ever-increasing demand for high-speed data transmission continues to motivate research and development efforts towards the sixth generation (6G) of wireless communication techn…
Sub-zeptojoule detection of terahertz pulses by parametric frequency upconversion
Défi Junior Jubgang Fandio, Aswin Vishnuradhan, Eeswar Kumar Yalavarthi +4
We combine parametric frequency upconversion with single-photon counting technology to achieve detection sensitivity down to the terahertz (THz) single-photon level. Our relatively…
Single-pulse time-resolved terahertz spectroscopy of sub-millisecond time dynamics
Nicolas Couture, Wei Cui, Markus Lippl +7
Slow motion movies are not only fascinating to watch, they also allow us to see intricate details of the mechanical dynamics of complex phenomena. If the images in each frame are r…
Spontaneous time-reversal symmetry breaking in twisted double bilayer graphene
Manabendra Kuiri, Christopher Coleman, Zhenxiang Gao +6
Twisted double bilayer graphene (tDBG) comprises two Bernal-stacked bilayer graphene sheets with a twist between them. Gate voltages applied to top and back gates of a tDBG device…
Ensemble spin relaxation of shallow donor qubits in ZnO
Vasileios Niaouris, Mikhail V. Durnev, Xiayu Linpeng +6
We present an experimental and theoretical study of the longitudinal electron spin relaxation () of shallow donors in the direct band-gap semiconductor ZnO. is measured…
Coherence properties of shallow donor qubits in ZnO
Xiayu Linpeng, Maria L. K. Viitaniemi, Aswin Vishnuradhan +4
Defects in crystals are leading candidates for photon-based quantum technologies, but progress in developing practical devices critically depends on improving defect optical and sp…