Apple may cite Poet Technologies' patents for a variety of reasons, including:

1. Licensing agreements: Apple may have entered into licensing agreements with Poet Technologies to use their patented technologies in their products.

2. Collaboration: Apple may be collaborating with Poet Technologies on research and development projects, and citing their patents as a result.

3. Intellectual property protection: Citing Poet Technologies' patents may help Apple protect their own intellectual property rights by demonstrating that they are aware of existing patents in the field.

4. Competitive analysis: Apple may be conducting competitive analysis to understand Poet Technologies' technology and innovation in order to stay ahead in the market. 

Overall, citing Poet Technologies' patents may be a strategic move by Apple to leverage their technology, knowledge, and innovation in their own products and services.