The impact of high dielectric constant on photonic bandgaps in PbSe-nanocrystal-based photonic crystal slabs

Weidong Zhou; Vinay Nair; Geetha Thiruvengadam

doi:10.1117/12.646167

28 February 2006 The impact of high dielectric constant on photonic bandgaps in PbSe-nanocrystal-based photonic crystal slabs

Weidong Zhou, Vinay Nair, Geetha Thiruvengadam

Author Affiliations +

Proceedings Volume 6128, Photonic Crystal Materials and Devices IV; 61280B (2006) https://doi.org/10.1117/12.646167
Event: Integrated Optoelectronic Devices 2006, 2006, San Jose, California, United States

Abstract

A detailed study was carried out to understand the photonic crystal design rules with very high dielectric constant (ε>13), based on plane wave expansion and finite difference time-domain (FDTD) techniques. It is found that the optimal dielectric constant contrast is indeed the one between conventional semiconductors (ε=12-14) and air. Either too high or too low contrast can lead to the reduction of complete photonic bandgap. With very high bulk dielectric constant (ε=20-25), PbSe nanocrystal quantum dots (NQDs) are suitable for air hole based PC structure with large TE gap. On the other hand, NQD backfilled photonic crystals with tunable bandgap is proposed based on the control of packing density of NQDs inside the air holes of photonic crystal structures. Both theoretical and experimental results on the integration process are reported.

Citation Download Citation

Weidong Zhou, Vinay Nair, and Geetha Thiruvengadam "The impact of high dielectric constant on photonic bandgaps in PbSe-nanocrystal-based photonic crystal slabs", Proc. SPIE 6128, Photonic Crystal Materials and Devices IV, 61280B (28 February 2006); https://doi.org/10.1117/12.646167

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