Figure 3: Quantum well design.
From: Phased-array sources based on nonlinear metamaterial nanocavities
(a) Schematic representation of the device, gold nanoresonators are patterned on top of the III–V multi-quantum well structure. (inset) Calculated band structure for one period of the quantum well heterostructure, the blue line depicts the conduction band, the green, red and light blue curves represent the probability density distributions for the first, second and third intersubbands, respectively, shifted according to their energies. (b) |Ez| as a function of depth into the quantum well stack at the position marked with an X symbol in Fig. 2, for FF and SH frequencies. We note a good field overlap that enables efficient SH generation. The red dotted line represents the position of the field plots from Fig. 2a–c.
