Optimizing effective phase modulation in coupled double quantum well Mach–Zehnder modulators<xref rid="cpb_27_2_027801fn1" ref-type="fn">*</xref><fn id="cpb_27_2_027801fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant No. 11474106), the Natural Science Foundation of Guangdong Province, China (Grant No. 2016A030313439), and the Science and Technology Program of Guangzhou City, China (Grant No. 201707010403).</p></fn>

Optimizing effective phase modulation in coupled double quantum well Mach–Zehnder modulators**

Project supported by the National Natural Science Foundation of China (Grant No. 11474106), the Natural Science Foundation of Guangdong Province, China (Grant No. 2016A030313439), and the Science and Technology Program of Guangzhou City, China (Grant No. 201707010403).

Wang Guang-Hui^{1, 2, †}, Zhang Jin-Ke^{1, 2}

(color online) The maximum net change of refractive index (Δn)_max versus the normalized mid-barrier width W_B/W_well for three different applied electric fields E_d, with W_well = 1 nm.