EQMResearch group
Level 5 · CrSBr & the experiment

The simulated stack

Au / CrSBr / DBR

Top gold mirror, ~100 CrSBr monolayers in the middle, and a Bragg mirror at the bottom — the full sandwich the TMM solves.

Build on:Distributed Bragg reflector (DBR),Fabry-Pérot microcavity,CrSBr

The whole sandwich

From top to bottom the simulator builds:

  1. Air on top.
  2. A thin gold film(~35 nm) acting as a partial mirror. Optional — the "remove gold" switch yanks it out.
  3. The CrSBr stack — about 100 monolayers, each 0.8 nm thick, coloured by its magnetic phase.
  4. An 8-pair DBR (SiO₂/SiN) tuned to 940 nm.
  5. An Si substrate beneath.
Air (n = 1)Au, ~35 nm (top mirror)CrSBr × ~100 (AFM / Mixed / FM)DBR (SiO₂ / SiN) × 8Si substrate (n ≈ 3.77)depth z
Cross-section of the simulated stack. The CrSBr region (middle) is what we want light to interact with; the two mirrors above and below trap that light long enough to make the interaction measurable.

What every layer is for

  • Au: easy-to-deposit top mirror, partly reflective everywhere.
  • CrSBr: the active medium; provides the exciton.
  • DBR: a near-perfect bottom mirror at 940 nm.
  • Si: a robust substrate; optically just a high-index half-space.
Key takeaways
  • Air | Au | CrSBr | DBR | Si — five blocks, four boundaries.
  • The two mirrors form the cavity.
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