Manipulating classical waves with an analogue of quantum interference in a V-type atom

¹ Key Laboratory of Advanced Micro-Structure Materials, Ministry of Education - Shanghai 200092, PRC
² Department of Physics, Tongji University - Shanghai 200092, PRC
³ Institute of Acoustics, Tongji University - Shanghai 200092, PRC
⁴ Beijing Computational Science Research Center - Beijing 100084, PRC

^a zgwang@tongji.edu.cn

Received: 30 October 2011
Accepted: 8 December 2011

Abstract

We demonstrate a waveguide system containing two side-coupled resonators to explore the interference effects between two low-Q resonators. The structure closely mimics the quantum interference between two direct excitation pathways in a three-level V-type atom. We show that high-Q transparency peak can be achieved by using two low-Q resonators, and the transmission lineshape can be tuned between an EIT-like resonant peak and a Lorentzian-like resonant dip. Acoustic experiments, in good agreement with the theoretical predictions, are performed to confirm this idea.