Optoelectronics Letters, Volume. 14, Issue 5, 367(2018)
Steady state multiple dark spatial solitons in the biased photorefractive-photovoltaic crystals
We theoretically study the evolution of dark solitons in the biased photorefractive-photovoltaic crystal by using beam propagation method (BPM). We find that when the absolute value of the extra bias field is less than the photovoltaic field, the dark screening-photovoltaic (SP) solitons can be observed. The initial width of the dark notch at the entrance face of the crystal is a key parameter for generating an sequence of dark coherent solitons. If the initial width of the dark notch is small, only a fundamental soliton or Y-junction soliton pair is generated. When the initial width of the dark notch is increased, the dark notch tends to split into an odd (or even) number of multiple dark solitons, which re-alizes a progressive transition from the low-order solitons to a sequence of higher-order solitons.
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ZHANG Yu-hong, SU Wei, DUAN Cun-li, TIAN Ai-ling. Steady state multiple dark spatial solitons in the biased photorefractive-photovoltaic crystals[J]. Optoelectronics Letters, 2018, 14(5): 367
Category: Materials
Received: Mar. 26, 2018
Accepted: May. 6, 2018
Published Online: Apr. 16, 2019
The Author Email: Yu-hong ZHANG (zhangyh1979@163.com)