Effect of Phase Modulation on Electromagnetically Induced Grating in a Five-Level M-Type Atomic Syst

• 作 者: 王丽 祁义红 邓立 钮月萍 龚尚庆 郭洪菊
• 机 构: Department of Physics, East China University of Science and Technology,School of Physics and Electro
• 出 处: Chinese Physics Letters
• 发表日期: 2017年07期
• 关键词: disperse grating Atomic depths orders directions normalized transparency posed c

We theoretically investigate the phenomena of electromagnetically induced grating in an M-type five-level atomic system. It is found that a weak field can be effectively diffracted into high-order directions using a standing wave coupling field, and different depths of the phase modulation can disperse the diffraction light into different orders. When the phase modulation depth is approximated to the orders of π, 2π and 3π, the first-, secondand third-order diffraction intensity reach the maximum, respectively. Thus we can take advantage of the phase modulation to control the probe light dispersing into the required high orders.

We theoretically investigate the phenomena of electromagnetically induced grating in an M-type five-level atomic system. It is found that a weak field can be effectively diffracted into high-order directions using a standing wave coupling field, and different depths of the phase modulation can disperse the diffraction light into different orders. When the phase modulation depth is approximated to the orders of π, 2π and 3π, the first-, second and third-order diffraction intensity reach the maximum, respectively. Thus we can take advantage of the phase modulation to control the probe light dispersing into the required high orders.