Demonstration of double EIT using coupled harmonic oscillators and RLC circuits

• Published in: European journal of physics Vol. 32; no. 2; pp. 541 - 558
• Main Authors: Harden, Joshua, Joshi, Amitabh, Serna, Juan D
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.03.2011; Institute of Physics Publishing; Institute of Physics
• Subjects: College Science; Communication, education, history, and philosophy; Energy; Exact sciences and technology; General physics; Magnets; Molecular Structure; Motion; Physics; Physics literature and publications; Science Experiments; Science Instruction; Science Laboratories; Surveys and tutorial papers, resource letters; Undergraduate Students; Damping; Four level atom; Transparency; Coupled oscillator; Higher education; Models; Equations of motion; Physics; Harmonic oscillators
• ISSN: 0143-0807; 1361-6404
• DOI: 10.1088/0143-0807/32/2/025

Single and double electromagnetically induced transparencies (EIT) in a medium, consisting of four-level atoms in the inverted-Y configuration, are discussed using mechanical and electrical analogies. A three-coupled spring-mass system subject to damping and driven by an external force is used to represent the four-level atom mechanically. The equations of motion of this system are solved analytically, which revealed single and double EIT. On the other hand, three coupled RLC circuits are used, as the electrical analogue, to explore and experimentally demonstrate single and double EIT. The simplicity of these two models makes this experiment appropriate for undergraduate students and easy to incorporate into a college physics laboratory. (Contains 12 figures.)