Interaction between meta-materials and shallow donors in bulk GaN at THz frequency

We report the coupling and interaction between shallow donors and microcavities in bulk GaN at THz frequencies. At 4K, the shallow donors lead to an absorption at 23.5 meV (5.7 THz) under optical pumping above the bandgap of GaN. The microcavities are based on metamaterials and are designed to resonate around 5.7 THz. At 4 K, the matter-cavity interaction is clearly demonstrated on differential transmission of the sample. The cavity resonance shifts when the absorption occurs. Our model and simulations are in good agreement with the experimental data. (C) 2014 Optical Society of America


Published in:
Optics Express, 22, 3, 3199-3207
Year:
2014
Publisher:
Washington, Optical Soc Amer
ISSN:
1094-4087
Laboratories:




 Record created 2014-04-14, last modified 2018-03-17


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