Volume 78, Number 5, June 2007
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||15 May 2007|
Tunable ultra-narrow band-gap of anomalous dispersion photonic crystals
Department of Physics, Capital Normal University - Beijing 100037, PRC
2 SKLSM, Institute of Semiconductors, Chinese Academy of Sciences - P.O. Box 912, Beijing 100083, PRC
3 China Institute of Atomic Energy (CIAE) - Beijing 102413, PRC
4 Beijing University of Traditional Chinese Medicine - Beijing 100102, PRC
Accepted: 12 April 2007
We use the transfer-matrix method to research the band structures in one-dimensional photonic crystals composed of anomalous dispersion material (saturated atomic cesium vapor). Our calculations show that that type of photonic crystal possesses an ultra-narrow photonic band gap and this band gap is tunable when altering the electron population in the atomic ground state of the anomalous dispersion material by the optical pumping method.
PACS: 42.70.Qs – Photonic bandgap materials / 78.67.-n – Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures / 32.10.Dk – Electric and magnetic moments, polarizability
© Europhysics Letters Association, 2007
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