Design an automatic measurement device containing an reflective sample which rotates around an VCSEL.

I'm looking for an expert to design an automatic measurement device for scientific research. The device has a reflective sample (a mirror or a piece of a silicon stamp) that rotates around a VCSEL.

Key Requirements:
- The reflective sample must meet specific size and dimension criteria, as well as certain reflectivity and material property specifications.
- The device must be capable of taking precise measurements of temperature fluctuations during the experiment.

Ideal Skills:
- Proficiency in design and engineering of measurement devices.
- Prior experience with VCSEL technology and reflective samples.
- Strong understanding of scientific research requirements and measurement accuracy.

I would appreciate bids from freelancers with a proven track record in similar projects.