Research Papers

Photonic band-edge-induced enhancement in absorption and emission

[+] Author Affiliations
Karikkuzhi Variyath Ummer

Indian Institute of Technology Kanpur, Department of Physics, Kanpur 208016, India

Ramarao Vijaya

Indian Institute of Technology Kanpur, Department of Physics, Kanpur 208016, India

Center for Lasers and Photonics, Indian Institute of Technology Kanpur, Kanpur 208016, India

J. Nanophoton. 9(1), 093086 (Feb 27, 2015). doi:10.1117/1.JNP.9.093086
History: Received December 4, 2014; Accepted January 30, 2015
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Abstract.  An enhancement in photonic band-edge-induced absorption and emission from rhodamine-B dye doped polystyrene pseudo gap photonic crystals is studied. The band-edge-induced enhancement in absorption is achieved by selecting the incident angle of the excitation beam so that the absorption spectrum of the emitter overlaps the photonic band edge. The band-edge-induced enhancement in emission, on the other hand, is possible with and without an enhancement in band-edge-induced absorption, depending on the collection angle of emission. Through a simple set of measurements with suitably chosen angles for excitation and emission, we achieve a maximum enhancement of 70% in emission intensity with band-edge-induced effects over and above the intrinsic emission in the case of self-assembled opals. This is a comprehensive effort to interpret tunable lasing in opals as well as to predict the wavelength of lasing arising as a result of band-edge-induced distributed feedback effects.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Topics

Absorption

Citation

Karikkuzhi Variyath Ummer and Ramarao Vijaya
"Photonic band-edge-induced enhancement in absorption and emission", J. Nanophoton. 9(1), 093086 (Feb 27, 2015). ; http://dx.doi.org/10.1117/1.JNP.9.093086


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