Northwestern Applied Physics PhD Program Guide 2026

Why Choose Northwestern Applied Physics for Your PhD

The Northwestern University Applied Physics Graduate Program occupies a distinctive position in American doctoral education, bridging the gap between fundamental physics research and practical engineering applications. As a cross-school program drawing faculty from both the McCormick School of Engineering and the Weinberg College of Arts and Sciences, it offers PhD students a genuinely interdisciplinary research environment that pure physics or pure engineering programs cannot match.

Under the co-direction of Professors Nathaniel Stern and Lincoln Lauhon, with Professor Pedram Khalili serving as Director of Graduate Studies, the program is designed to equip students with broad knowledge of key principles of modern applied physics while rapidly guiding them toward original research. The program’s mission statement makes its philosophy clear: graduates should emerge as productive scientists capable of advancing knowledge, communicating results through publications and oral presentations, and becoming leaders of scientific thought.

What makes this program particularly compelling is its focus on practical outcomes. Unlike terminal masters programs, Northwestern Applied Physics admits only students intending to pursue the PhD, ensuring that every admitted student is fully committed to a research trajectory. The expected completion time of five years reflects the program’s efficient structure: approximately one year of intensive coursework followed by four years of full-time research. This balance produces graduates who are both theoretically grounded and experimentally accomplished — a combination that opens doors to careers in academia, national laboratories, and advanced technology companies. For students weighing their options across physics-related doctoral programs, comparing this program with the Northwestern Physics Masters can clarify which path best aligns with research vs. coursework preferences.

Program Structure and Five-Year PhD Timeline

The Northwestern Applied Physics PhD follows a carefully structured timeline designed to move students from foundational coursework to independent research as efficiently as possible, with well-defined milestones ensuring steady progress throughout the doctoral journey.

Year 1 is primarily devoted to coursework, with students completing the bulk of their nine required core courses across Fall, Winter, and Spring quarters. Crucially, students must also select their research advisor during Fall Quarter of the first year — a deliberately early timeline that enables research immersion to begin alongside coursework rather than waiting until courses are complete. The year culminates with the Qualifying Examination by the end of Spring Quarter, which evaluates not just coursework knowledge but also the student’s ability to read, understand, and critically discuss scientific literature.

Year 2 balances additional coursework with the beginning of significant research work. Students complete remaining requirements including computational methods, experimental methods, and condensed matter or solid-state physics courses, along with their two required electives. By this point, the research relationship with the thesis advisor should be well-established and productive.

Year 3 marks the transition to full research mode. Any remaining elective courses must be completed, and students must present their Thesis Proposal and Defense (Prospectus) by the end of Spring Quarter. This milestone requires a written proposal of approximately 20 pages and a 30-minute oral defense before the thesis committee. Students also give their first Applied Physics Seminar Presentation, practicing the scientific communication skills they will need throughout their careers.

Years 4 and 5 are devoted entirely to research, with students registered for TGS 500: Advanced Doctoral Studies. The Final Thesis Defense typically occurs in the fifth year, consisting of a mandatory public oral presentation followed by a closed examination with the faculty committee. The entire defense process, from public talk through committee deliberation, is allocated three hours.

The maximum time allowed by The Graduate School is nine years from initial registration, but the program strongly expects completion within five years. Students who fall behind milestones face academic probation with clearly defined remediation timelines, reinforcing the program’s commitment to keeping doctoral trajectories on track.

Northwestern Applied Physics Core Curriculum and Courses

The Applied Physics PhD curriculum requires nine letter-graded core courses plus two electives, carefully sequenced to build from theoretical foundations through specialized knowledge areas. The course load runs at three to four units per quarter, with research credits (APP PHYS 590) filling any gaps to maintain full-time enrollment status.

The first-year Fall Quarter sets the theoretical foundation with three demanding courses: Physics 411-1: Methods of Theoretical Physics, Physics 412-1: Quantum Mechanics I, and either MAT_SCI 401-0: Chemical and Statistical Thermodynamics of Materials or Physics 416-0: Introduction to Statistical Mechanics (taken in Winter instead). Students also complete the non-credit GEN_ENG 519-0: Responsible Conduct of Research Training, which is required by the program and reflects growing emphasis on research ethics in STEM graduate education.

Winter Quarter continues with Physics 412-2: Quantum Mechanics II, Physics 414-1: Electrodynamics, and the alternative thermodynamics/statistical mechanics course not taken in Fall. Spring Quarter introduces condensed matter content through either MAT_SCI 405-0: Physics of Solids or Physics 422-1: Condensed-Matter Physics.

The second year adds specialized methods courses: a 400-level Computational Methods of Applied Physics course and a 400-level Experimental Methods of Applied Physics course, both chosen from offerings across departments participating in the Applied Physics program. These methods courses bridge the gap between theoretical knowledge and practical research capability, ensuring students can both design experiments and analyze data computationally.

The two required elective courses must be completed by the end of Year 3 and are chosen in consultation with the research advisor. Electives must be 400-level courses from participating departments, though certain 300-level courses may count with DGS approval. This flexibility allows students to build specialized expertise aligned with their thesis research direction. Course waivers are available for students with sufficient preparation, though waived courses do not count toward the nine required letter-graded courses — they simply free time for additional electives or earlier research immersion.

Research Advisor Selection and Lab Matching

Selecting a research advisor is identified by the Northwestern Applied Physics program as one of the most important decisions a doctoral student will make, and the timeline reflects this gravity: students must choose their advisor during Fall Quarter of their first year, with the formal advisor invitation accepted on the GSTS website by late November.

The process begins during the first weeks of Fall Quarter, when incoming students meet faculty members one-on-one to discuss research interests, lab culture, and project availability. The Applied Physics faculty spans both the McCormick School of Engineering and the Weinberg College of Arts and Sciences, giving students access to a diverse range of research programs from nanoscale materials and quantum information to photonics and condensed matter physics.

Advisor availability is governed partly by funding — not all faculty may have positions open for new students in any given year. Students who struggle to find a suitable match near the deadline are advised to contact the Director of Graduate Studies, Professor Pedram Khalili, who can help identify alternative options or facilitate introductions to faculty the student may not have considered.

Once selected, the research advisor plays a central role throughout the doctoral experience. Beyond guiding thesis research, the advisor serves as a committee member on the Qualifying Exam, chairs both the Thesis Proposal Defense and the Final Thesis Defense committees, advises on course selection (particularly electives), and provides the financial support that sustains students from their second year through graduation. Changes of advisor are possible in rare circumstances — such as loss of funding or fundamental changes in research direction — but these cases are handled individually by the DGS, underscoring the importance of making a well-informed initial choice.

Northwestern Applied Physics Qualifying Examination

The Qualifying Examination is the first major milestone in the Applied Physics PhD, scheduled by the end of Spring Quarter of the first year. Unlike qualifying exams at some programs that focus primarily on testing coursework knowledge, the Northwestern Applied Physics qualifying exam evaluates a broader set of competencies: scientific communication, critical analysis of literature, and the ability to contextualize research within the broader field.

The format centers on a 30-minute oral presentation on a research topic that must be distinct from the student’s own past and present research. The topic must be drawn from literature published within the past five years, must concern research conducted outside Northwestern University, and must not relate to the student’s planned thesis topic or undergraduate research. These constraints are designed to assess the student’s ability to independently engage with unfamiliar scientific work — a fundamental skill for doctoral-level research.

The presentation must be based on the student’s independent analysis, with original slides (no materials prepared by others), and must describe reported results while providing critical perspective and demonstrating understanding of background material and basic physical concepts. Two weeks before the exam, students submit the title and copies of the scientific publications to their three-member committee and the Program Assistant.

Following the presentation, a closed Q&A session covers the presentation content, the research and publications discussed, the student’s overall knowledge and readiness for research, and first-year graduate coursework. The entire session is nominally one hour but may be extended at the committee’s discretion, with 90 minutes reserved.

Three outcomes are possible: Pass (recommended for PhD candidacy), Conditional Pass (pass with specific conditions to be met within a defined timeline), or Fail (placed on academic probation with one retake opportunity before the end of Summer Quarter). A second failure results in exclusion from the program — a clear incentive for thorough preparation and genuine engagement with the scientific literature during the first year.

Thesis Proposal, Defense, and Key Milestones

The Thesis Proposal and Defense (Prospectus) is the second major milestone, due by the end of Spring Quarter of the third year. This milestone establishes the formal research plan that will guide the remaining years of the doctoral project and requires both a substantial written document and an oral defense.

The written proposal must be approximately 20 pages (double-spaced, including references) and must include a title, abstract, introduction, review of relevant literature, motivation and description of the proposed research, and a discussion of possibilities for discovery. This document must be submitted to the thesis committee and Program Assistant at least 14 days before the scheduled defense date.

The oral defense consists of a 30-minute presentation followed by committee questions about the proposed research project, with 1.5 hours reserved for the full session. The three-member committee (four for co-advised students) must include at least two Applied Physics faculty members, one of whom is the thesis advisor. Students register their committee on the GSTS website before the prospectus date.

The Final Thesis Defense caps the doctoral journey, typically in the fifth year. This is the most formal of the program’s milestones, beginning with a mandatory public oral presentation and discussion (approximately one hour), followed by a closed examination with the faculty committee. Three hours are reserved for the full process. Before the defense, students must submit their “Application for a Degree” form through GSTS, receive advisor approval that the dissertation is in final form, and provide committee members with a copy of the dissertation at least two weeks prior.

Throughout the program, students also give Applied Physics Seminar Presentations — first in Year 3 as practice, and again in Year 5 at a quality level suitable for a conference or job talk. These presentations develop the scientific communication skills that are essential for careers in both academia and industry, and they provide valuable feedback from the broader department community.

Funding, Stipend, and Financial Support

The Northwestern Applied Physics PhD provides comprehensive financial support that covers the full cost of attendance plus a competitive living stipend. For the 2023-24 academic year, the annual stipend was set at $36,960 — a rate determined by The Graduate School (TGS) that applies across Northwestern’s doctoral programs. This package includes full tuition scholarship and health insurance, eliminating the financial barriers that can impede doctoral research progress.

First-year funding is provided by the program itself, ensuring that incoming students are financially supported while they complete coursework and select their research advisor. From the second year onward, students are typically supported as Research Assistants through their thesis advisor’s research grants, a structure that aligns financial support with research productivity and advisor-student collaboration.

An important practical detail: all paychecks are delivered via direct deposit on the last working day of each month. Critically, the first paycheck does not arrive until September 30th — meaning incoming students must plan their finances to cover initial expenses including housing deposits, moving costs, and daily expenses for the first month without program income. The department explicitly warns students about this gap and encourages advance financial planning.

Students who win external awards or fellowships must discuss these with the Program Assistant for proper account setup. If an award includes salary support, the program adjusts the stipend so that total compensation does not exceed the current year’s total awards amount. Award money designated for educational expenses — conference travel, books, computer purchases — remains available beyond the stipend cap, providing meaningful additional resources for professional development. Students are also eligible for scholarships and fellowships through both McCormick School of Engineering and Weinberg College of Arts and Sciences, reflecting the program’s cross-school positioning.

It is worth noting that fees other than tuition remain the student’s responsibility, and late payments can trigger registration holds that prevent enrollment in subsequent quarters. Students should budget for these fees and ensure timely payment to avoid administrative complications. For a comparison of graduate funding across institutions, the UCSD Neurosciences PhD program offers a useful benchmark with its $36,000 annual stipend package.

Faculty and Cross-School Research Opportunities

The cross-school structure of the Northwestern Applied Physics program is one of its most distinctive features. By drawing faculty from both the McCormick School of Engineering and the Weinberg College of Arts and Sciences, the program creates an intellectual environment where fundamental physics questions meet engineering applications in ways that drive innovation.

Co-Directors Nathaniel Stern and Lincoln Lauhon exemplify this interdisciplinary ethos. The program’s faculty work across a broad spectrum of applied physics research areas, including nanophotonics, quantum materials, condensed matter physics, computational physics, device physics, and materials characterization. This breadth ensures that students can find advisors working at the specific intersection of theory and application that matches their research interests.

The cross-school positioning also creates practical advantages for students. Elective courses can be drawn from departments across both schools — EECS, Materials Science, Chemistry, and Applied Mathematics all contribute relevant offerings. Teaching assistantships, which are required for all PhD students, can be fulfilled in any department participating in the Applied Physics program, providing exposure to different pedagogical approaches and student populations.

Northwestern’s location in the Chicago metropolitan area adds another dimension of research opportunity. The proximity to Argonne National Laboratory and Fermilab — two of the U.S. Department of Energy’s premier national laboratories — provides access to facilities and collaborations that amplify the research capabilities available to Applied Physics students. The Advanced Photon Source at Argonne, in particular, offers characterization capabilities that complement many applied physics research programs.

Student Life, Diversity, and Academic Support

The Northwestern Applied Physics program has articulated a clear vision for diversity, equity, and inclusion, recognizing that diversity in all forms is essential for program success. Founded on principles of collaboration and interdisciplinary research, the program aims to build an environment where everyone can thrive regardless of gender expression, gender identity, sexual orientation, nationality, ethnicity, race, religion, or any other identity. This commitment extends to active recruitment, retention, and engagement with underrepresented and underserved communities.

Notably, the program’s DEI statement equally values academic achievements, personal development, and overall well-being — a framing that acknowledges the whole-person demands of doctoral education and creates space for students to seek support without stigma. This philosophy is backed by concrete resources: Counseling and Psychological Services (CAPS) at Northwestern provides clinical services, educational workshops, and faculty consultation at the Evanston campus location in Searle Hall.

The program’s conflict resolution framework provides multiple escalation paths depending on the nature of the issue. For conflicts involving discrimination or harassment, students are directed to the Office of Civil Rights and Title IX Compliance. For other conflicts, the recommended path starts with the Director of Graduate Studies, escalates to the Department Chair if the DGS has a conflict of interest, and can be elevated to TGS if needed. Confidentiality is maintained unless concerns involve sexual harassment, discrimination, or safety issues.

International students receive comprehensive support through Northwestern’s Office of International Student and Scholar Services, including visa assistance and Form I-20 processing. The program accommodates international students’ visa requirements through TGS 512 registration during summer quarters and provides access to English Language Programs for students who want to strengthen their academic communication skills.

Leave of absence policies cover medical, family, parental, and general circumstances, with all leaves requiring approval from the advisor, DGS, and TGS. The program’s structured approach to leaves acknowledges that life events happen during a multi-year doctoral program and provides clear procedures for managing them without derailing academic progress. Students interested in comparing support structures across institutions may find the Imperial College London graduate programs offer useful points of comparison.

Academic Standards, Probation, and Graduation

The Northwestern Applied Physics program maintains clear and rigorous academic standards, with three interrelated sets of criteria for satisfactory progress: program timeline adherence, grades and GPA, and completion of internal milestones. Understanding these standards is essential for navigating the doctoral journey successfully.

The minimum cumulative GPA requirement is 3.0, consistent with TGS policy. Students whose GPA falls below this threshold are placed on academic probation and given at most two quarters (excluding summer) to restore satisfactory standing. More than three incomplete (Y or X) grades also triggers probation. During probation, students remain eligible for federal and institutional financial assistance, but failure to resolve the issue within the probationary period can lead to exclusion from the program.

Internal milestone deadlines add time-based accountability: the Qualifying Examination must be passed by the end of Spring Quarter of Year 1 (with a single retake opportunity by end of Summer if failed), and the Thesis Proposal Defense must be completed by the end of Spring Quarter of Year 3. Missing these deadlines triggers milestone-specific probation that must be resolved by the end of the immediately following Summer Quarter.

Academic progress is monitored annually through GSTS, with students submitting progress reports before the end of each Summer Quarter and advisors providing their own assessments through the same system. Grades are checked each quarter for substandard performance, creating a continuous monitoring loop that identifies potential problems before they become critical.

The exclusion (dismissal) process includes important due process protections. Students are informed in writing within five business days of an exclusion decision, including the effective date and reasons. An appeal can be filed within 10 days to The Graduate School’s Director of Student Services, with the Dean of TGS reviewing the appeal and providing a final decision within 30 days. If no appeal is filed within the 10-day window, the exclusion decision becomes final.

Graduation itself follows a structured process: submitting the Application for a Degree form through GSTS, securing advisor approval of the final dissertation, providing committee members with the dissertation at least two weeks before the defense, and completing any post-defense revisions required by the committee. Commencement takes place once a year in mid-June, with all graduates invited regardless of their actual quarter of completion.