In Hyung Baek

TL;DR: In this paper, an efficient passive mode-locking of a Ti:sapphire laser with a monolayer graphene saturable absorber is demonstrated for the first time, which exhibits ultrafast recovery times and excellent nonlinear absorption behavior for bulk solid-state laser mode locking near 800 nm.

TL;DR: High-quality monolayer graphene as large as 1.2×1.2 cm2 was synthesized by chemical vapor deposition and used as a transmitting saturable absorber for efficient passive mode-locking of a femtosecond bulk solid-state laser.

TL;DR: Compared to the benchmark inorganic and organic crystals, the new quinolinium crystal possesses excellent crystal properties and THz generation characteristics with broader THz spectral coverage and higher THz conversion efficiency at the technologically important pump wavelength of 800 nm.

TL;DR: In this paper, a novel ionic electro-optic quinolinium single crystal for THz wave applications is reported, which exhibits high order parameters cos3θp = 0.92 and cos3αp = 1.0, respectively.

TL;DR: In this article, a nonlinear N-benzyl stilbazolium nonlinear optical chromophore with a non-polar benzyl group was developed to achieve acentric molecular ordering in the crystalline state.