A5078121052- Advanced Fiber Laser Technologies
- Diamond and Carbon-based Materials Research
- Laser-Matter Interactions and Applications
- Photonic and Optical Devices
- Carbon and Quantum Dots Applications
- Mechanical and Optical Resonators
- Graphene research and applications
- 2D Materials and Applications
Korea Institute of Science and Technology
2020-2024
Korea University of Science and Technology
2020-2024
Fabrication of high quantum efficiency nanoscale device is challenging due to increased carrier loss at surface. Low dimensional materials such 0D dots and 2D have been widely studied mitigate the loss. Here, we demonstrate a strong photoluminescence enhancement from graphene/III-V dot mixed-dimensional heterostructures. The distance between graphene in 2D/0D hybrid structure determines degree radiative recombination 80% 800% compared only structure. Time-resolved decay also shows lifetimes...
Abstract Generation of high-speed laser pulses is essential for sustaining today’s global, hyper-connected society. One approach achieving high spectral and temporal purity to combine optical nonlinear materials with filtering devices. In this work, a graphene-coated microresonator integrates material platform into single device, creating tunable GHz repetition rate mode-locked fiber laser. The graphene directly synthesized on the non-planar surface microresonator, resulting in uniform,...
Effective high-capacity data management necessitates the use of ultrafast fiber lasers with mode-locking-based femtosecond pulse generation. We suggest a simple but highly efficient structure graphene saturable absorber in form graphene/poly(methyl methacrylate) (PMMA)/graphene capacitor and demonstrate generation ultrashort pulses by passive mode-locking ring laser cavity, simultaneous electrical switching (on/off) operation. The voltage applied to shifts Fermi level layers, thereby...
• A transfer-free atomic carbon spraying provides large-area uniform surface coverage. Strong nonlinearities owing to the high percentage of sp 2 bonding (73.94 %) Rapid saturation with energy-efficient response absorber (32.14 MW cm -2 ) Conformal graphene greatly outperforms conventional process. Efficient saturable absorption comparable that CVD-grown graphene. Optical (SA) in has been intensively studied during last decades achieve graphene-based ultrafast pulse generation. We...