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G. Julien and . Bahir, Femto-second electron transit time characterization in GaN/AlGaN quantum cascade detector at 1.5 micron, Applied Physics Letters, vol.99, p.202111, 2011.

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E. Sarigiannidou, F. H. Monroy, and . Julien, Intersubband absorption of GaN/AlGaN step quantum wells at THz frequencies, Applied Physics Letters, vol.97, p.191101, 2010.

F. Sarigiannidou, E. Julien, and . Monroy, Effect of doping on the mid-infrared intersubband absorption in GaN/AlGaN superlattices grown on Si (111) templates, Applied Physics Letters, vol.96, p.141903, 2010.
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E. Bahir, F. H. Monroy, and . Julien, GaN/AlGaN intersubband optoelectronic devices, New Journal of Physics, vol.11, p.125023, 2009.