Tiantian Chen, Tengfei Dai, Chaoran Chen, Xiang Liu, Jianhua Chang. Controllable All-Solid-State Pulsed Laser Based on Graphene Capacitor Devices[J]. Chinese Journal of Lasers, 2022, 49(3): 0301003
- Chinese Journal of Lasers
- Vol. 49, Issue 3, 0301003 (2022)
Fig. 1. Flow chart of preparation of graphene capacitor
Fig. 2. Preparation and characterization of graphene capacitor. (a) Preparation process; (b) operation principle of device；(c) Raman spectrum; (d) transmission spectra
Fig. 3. Electrode structural diagrams of graphene capacitor. (a) Micrographs of ring electrode; (b) simulated electric field intensity diagram
Fig. 4. Photoelectric performances of graphene capacitor. (a) Optical absorption spectra under different gate voltages；(b) capacitance characteristics; (c) band diagram of negative pressure device; (d) band diagram of positive pressure device
Fig. 5. Nonlinear transmission characteristics of graphene device. (a) Nonlinear absorption characteristics of device under different gate voltages; (b) modulation depth versus gate voltage of graphene device
Fig. 6. Experimental layout of passively Q-switched green laser based on graphene device
Fig. 7. Output powers of continuous and pulsed lasers versus absorbed pump power
Fig. 8. Single pulse and pulse sequence (inset) under each gate voltage. (a) 0 V; (b) 60 V
Fig. 9. Pulse duration and repetition rate versus gate voltage
Fig. 10. Laser stability analysis. (a) Output power versus PPLN crystal temperature; (b) time evolution of output power
Fig. 11. Output characteristics of pulsed laser at absorbed pump power of 1.78 W. (a) Laser spectrum and light spot (inset); (b) laser spectrum
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