Selectable-frequency and tunable-Q perfect transmissions of electromagnetic waves in dielectric heterostructures

Wang, Z.; Peng, R.W.; Qiu, F.; Huang, X.Q.; Wang, Mu; Hu, A.; Jiang, S.S.; Feng, D.
May 2004
Applied Physics Letters;5/17/2004, Vol. 84 Issue 20, p3969
Academic Journal
Multiple perfect transmissions of electromagnetic waves are found in the photonic band gap of the symmetric dielectric heterostructures (SDH) constructed as (AB)nBm(BA)n, where A and B stand for different dielectric materials, and m and n are the repeating numbers of the units. The photonic frequency and the mode number of resonant transmissions therein can be manipulated by varying m, and the quality factor Q of the perfect transmission peak increases exponentially with increasing n. These features are experimentally demonstrated in a SDH of TiO2/SiO2 for visible and near infrared light. The possible applications of SDH for the wavelength division multiplexing system are discussed.


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