Photonics Engineer

Primary Duties & Responsibilities

• Device Design & Simulation
  • Design and model backside-emitting VCSEL structures optimized for 1060 nm emission.
  • Develop and simulate photonic crystal cavity structures to enhance lightgraphene interaction.
  • Optimize device parameters for >100 GHz 3 dB bandwidth <3 V modulation bias and >3 dB extinction ratio.
• Graphene Integration
  • Collaborate with Graphenea on graphene deposition and doping strategies.
  • Evaluate doping approaches (boron and molecular adsorbate) for Fermi level tuning and resistance control.
  • Define gate oxide materials and thicknesses to minimize RC time constants in device performance.
• Fabrication Coordination
  • Work with Coherents Sherman facility to coordinate deposition patterning and etching processes.
  • Oversee e-beam lithography (EBL) and reactive ion etching (RIE) for photonic crystal patterning.
  • Integrate ITO contacts and graphene layers for electrical backgating.
• Testing & Characterization
  • Perform electrical efficiency and high-speed modulation testing of graphene-based VCSELs.
  • Conduct optical reflection and modulation experiments using spectrometers beamsplitters and photodiodes.
  • Collaborate with Coherent teams in Fremont and Stanford University for advanced characterization.
• Collaboration & Documentation
  • Work cross-functionally with materials scientists process engineers and external partners.
  • Maintain detailed experiment logs test reports and contribute to patent filings and publications.

Education & Experience

• M.S. or Ph.D. in Electrical Engineering Applied Physics Materials Science or related field.
• 3 years of experience in VCSEL photonics or optoelectronic device R&D.
• Hands-on experience with nanofabrication (EBL RIE PVD/ALD/CVD).
• Proficiency with optical and electrical modeling tools (Lumerical COMSOL or equivalent).
• Experience with high-speed (GHz) optoelectronic testing.
• Experience working with 2D materials (e.g. graphene) in optoelectronic applications.

Skills

• Knowledge of graphene doping and gate-tunable devices.
• Experience in cross-site collaboration and vendor management (international).
• Familiarity with backside-emitting VCSEL architectures and photonic crystal design.
• Strong interpersonal teaming and problem-solving skills.
• Work effectively with other members of Coherent Corp. xxxxx.

Working Conditions

• Onsite or hybrid work
• Regular collaboration with engineers and scientist in a fast-paced R&D setting with both independent and team-based tasks

Physical Requirements

• Ability to perform fine manual tasks under a microscope and handle delicate semiconductor components with precision.
• Capability to stand or sit for extended periods while working in a lab or cleanroom environment.

Safety Requirements

All employees are required to follow the site EHS procedures and Coherent Corp. Corporate EHS standards.

Quality and Environmental Responsibilities

Depending on location this position may be responsible for the execution and maintenance of the ISO 9000 and/or other applicable standards that may apply to the relevant roles and responsibilities within the Quality Management System and Environmental Management System.

CultureCommitment

Ensure adherence to companys values (ICARE) in all aspects of your position at Coherent Corp.:

Integrity Create an Environment of Trust

Collaboration Innovate Through the Sharing of Ideas

Accountability Own the Process and the Outcome

Respect Recognize the Value in Everyone

Enthusiasm Find a Sense of Purpose in Work

Coherent Corp. is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex gender identity sexual orientation race color religion national origin disability protected Veteran status age or any other characteristic protected by law.

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