Principal R&D Laser EPI Design Engineer

At Lumentum, we’re building the tech behind the world’s fastest networks and most advanced systems. Our optical and photonic solutions power everything from AI and cloud computing to data centers, telecom, and advanced manufacturing. We’re a global team of innovators working where light meets technology, solving big challenges that keep the world connected and moving forward. If shaping the future of connectivity excites you, you’ll fit right in.

• Coordinate with device designers to develop the epitaxial growth recipes needed for the devices to meet the wide range of performance requirements including output power, drive voltage, beam characteristics, wavelength, high-speed operation and reliability
• EPI design includes, but is not limited to, modeling design inputs such as layer thicknesses and compositions, doping profiles, active regions, growth conditions to outputs such as mode profiles, beam divergence and electrical resistance
• EPI designs must align with the wafer processing and device design technology with high yield
• Translate designs into EPI growth recipes and interact with internal EPI growers or manage external vendors to execute the growths
• For each growth campaign review all available calibration and EPI characterization data and feedback to internal or external growers or modify EPI designs as needed
• Work with device designers and wafer process integration teams to launch process runs
• Support NPI team to analyze all critical wafer processing, device testing and reliability data to feedback to EPI design improvements
• Coordinate any special EPI related analysis to understand performance and reliability such as SIMS, TEM, EDX
• Generate key intellectual property (IP) for novel ideas in device design or EPI designs

PhD degree in optoelectronics or other relevant major with industry experience is minimum requirement

• PhD degree in optoelectronics or other relevant major with industry experience is minimum requirement
• Hands‑on experience with MBE or MOCVD growth of III/V semiconductor material, preferred experience with GaAs based VCSEL devices
• Experience with semiconductor wafer analysis such as photoluminescence (PL), Reflectance spectrum, EPI defects and haze scans, X-Ray diffraction (XRD), SIMS, ECV profiling
• Knowledge of semiconductor device physics, laser diode testing and wafer process technology
• Experience with software data analysis tools (such as Excel, JMP, Minitab) and data processing (Python, Matlab)
• Excellent ability to work in cross-functional teams as both a team leader and a contributor
• Strong verbal and written communication skills

• Experience with VCSEL devices
• Experience with device modeling and device simulation
• Strong communication skills

• Flexible time off
• Health and wellness benefits (physical and mental)
• Tuition reimbursement and career growth support
• A workplace built for you: free gym, games room, prayer room
• Subsidized meals, free coffee/tea
• Employee stock options and incentive plans

Join a Team That’s Shaping the Future At Lumentum, we’re more than just a workplace—we’re a launchpad for creativity and innovation. We’re committed to celebrating your unique talents and helping you grow. Our guiding principles—Innovate, Engage, Deliver, Excel, and Win—aren’t just words; they’re the heart of what we do. Let’s Build a Brighter Future Together! We’re committed to building an inclusive workplace where everyone feels valued and empowered.

We welcome applicants from all backgrounds and provide accommodations for individuals with disabilities throughout the hiring process. Your uniqueness makes us stronger, sparks…