3 papers
physics.optics2026
Integration of diamond nanobeams with SnVs on Al2O3 waveguides for scalable quantum photonic chip application
Yeting Yang, Ryota Kitagawa, Tetsuya Miyatake +14
Tin vacancy (SnV) centers in diamond are promising solid state qubits for integrated quantum photonics. Here, we fabricate and characterize a diamond on Al2O3 dual taper waveguide…
cond-mat.mtrl-sci2025
Phonon dynamics of a bulk WSe crystal excited by ultrashort near-infrared pulses
Itsuki Kasai, Itsuki Takagi, Kazutaka G. Nakamura
Pump-probe reflectivity measurements have been performed on a single crystal of tungsten diselenide (WSe) using ultrashort near-infrared pulses. The behavior is well reproduced…
cond-mat.mtrl-sci2024
Dual role of longitudinal optical phonons for generation of coherent oscillations in gallium arsenide under optical pumping
Itsuki Takagi, Yuma Konno, Yosuke Kayanuma +1
We present a novel and simple picture of the generation dynamics of coherent longitudinal optical (LO) phonons and LO-phonon-plasmon-coupled (LOPC) modes by the ultrafast infrared…