Abnormal enhancement against interference inhibition for few-cycle pulses propagating in dense media

• Published in: Optics communications Vol. 364; pp. 123 - 128
• Main Authors: Chen, Yue-Yue, Feng, Xun-Li, Xu, Zhi-Zhan, Liu, Chengpu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2016
• Subjects: Few-cycle pulses propagation; Reflected spectrum; Transient; Reflected spectrum; Few-cycle pulses propagation; Transient
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2015.11.051

We numerically study the reflected spectrum of a few-cycle pulse propagating through an ultrathin resonant medium. According to the classical interference theory, a destructive interference dip is expected at the carrier frequency ωp for a half-wavelength medium. In contrast, an abnormal enhanced spike appears instead. The origin of such an abnormal enhancement is attributed to the coherent transient effects. In addition, its scaling laws versus medium length, pulse area and duration are obtained, which follow simple rules. •Studied the reflected spectrum of a few-cycle pulse propagating through an ultrathin resonant medium.•Disclosed the abnormal enhancement in the reflected spectrum.•Gave an explanation about the origin of the abnormal enhancement.•Tested the explanation with numerical calculation.