Circuits fabricated from GaAs or AlGaAs operate in wavelength region of __________

• A. 0.1 and 0.2 ‚âà√≠¬¨‚à´m
• B. 0.8 and 0.9 ‚âà√≠¬¨‚à´m
• C. 0.4 and 0.6 ‚âà√≠¬¨‚à´m
• D. 0.6 and 0.7 ‚âà√≠¬¨‚à´m