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 optical gain coefficient, g, in (a) and the net change of refractive indexes between two arms, Δn, in (b) as a function of the wavelength of incident light, λ, under various applied electric fields, respectively.