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 well-width ratio W_L/W_R with W_R = 1 nm in (a), and the well-width ratio W_R/W_L with W_L = 1 nm in (b), under various applied electric fields.