中国物理B ›› 2009, Vol. 18 ›› Issue (7): 2839-2845.doi: 10.1088/1674-1056/18/7/036

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Temporal behaviour of open-circuit photovoltaic solitons

张彦鹏1, 卢克清2, 张美志3, 程光华3, 李可昊3, 张贻齐3, 张玉虹3   

  1. (1)Department of Electronic Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China; (2)State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciencess, Xi'an 710119, China; (3)State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciencess, Xi'an 710119, China;Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • 收稿日期:2008-09-23 修回日期:2009-03-08 出版日期:2009-07-20 发布日期:2009-07-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10674176).

Temporal behaviour of open-circuit photovoltaic solitons

Zhang Mei-Zhi(张美志)a)b)†, Lu Ke-Qing(卢克清)a), Cheng Guang-Hua(程光华)a), Li Ke-Hao(李可昊)a)b), Zhang Yi-Qi(张贻齐)a)b), Zhang Yu-Hong(张玉虹)a)b), and Zhang Yan-Peng(张彦鹏)c)   

  1. a State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciencess, Xi'an 710119, China; b Graduate School of Chinese Academy of Sciences, Beijing 100039, China; c Department of Electronic Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2008-09-23 Revised:2009-03-08 Online:2009-07-20 Published:2009-07-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10674176).

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摘要： Based on the time-dependent band-transport model in a photorefractive medium, dark open-circuit photovoltaic (PV) solitons are investigated both theoretically and experimentally. Compared with those of the time-independent models, our theoretical results revealed that quasi-steady-state and steady-state PV solitons can both be obtained. Our results also revealed that when r < 1 (r is the normalized intensity at infinity), the full width at half maximum (FWHM) of solitons decreases monotonically to a constant value; when r > 1, however, the FWHM of solitons first decreases to a minimum before it increases to a constant value. Moreover, the FWHM of steady solitons decreases with increasing intensity ratio for r < 1, and increases with increasing intensity ratio for r > 1. We further observed dark PV solitons in experiments, and recorded their evolution. These results indicated that steady solitons can be observed at low optical power, while quasi-steady-state solitons can only be generated at higher optical power. Good agreement is found between theory and experiment.

Abstract: Based on the time-dependent band-transport model in a photorefractive medium, dark open-circuit photovoltaic (PV) solitons are investigated both theoretically and experimentally. Compared with those of the time-independent models, our theoretical results revealed that quasi-steady-state and steady-state PV solitons can both be obtained. Our results also revealed that when $r < 1$ ($r$ is the normalized intensity at infinity), the full width at half maximum (FWHM) of solitons decreases monotonically to a constant value; when $r > 1$, however, the FWHM of solitons first decreases to a minimum before it increases to a constant value. Moreover, the FWHM of steady solitons decreases with increasing intensity ratio for $r < 1$, and increases with increasing intensity ratio for $r > 1$. We further observed dark PV solitons in experiments, and recorded their evolution. These results indicated that steady solitons can be observed at low optical power, while quasi-steady-state solitons can only be generated at higher optical power. Good agreement is found between theory and experiment.

Key words: temporal behaviour, photovoltaic solitons, photorefractive effect

中图分类号:  (Optical solitons; nonlinear guided waves)

  • 42.65.Tg
42.65.Hw (Phase conjugation; photorefractive and Kerr effects) 72.40.+w (Photoconduction and photovoltaic effects)