Quantum nonlinear optics
At the single-photon level, sufficiently strong interactions can alter transmission statistics.
Physical intuition
At the single-photon level, sufficiently strong interactions can alter transmission statistics. This is the starting point for understanding how nanoscale optical geometry changes the states or dynamics accessible to light and matter.
Deep dive: how the mechanism works
Emitter-mediated nonlinear response can make the presence of one photon modify the probability of transmitting another.
How the quantum phenomenon appears
Photon blockade suppresses multiphoton occupancy of a strongly coupled cavity. To distinguish a genuinely quantum signal from a classical optical response, connect the device physics to a measurement such as photon correlations, interference visibility, energy-level structure or quantum-state tomography where appropriate.
Assumptions and limitations
Research and simulation exercise
Identify the tunable parameters, predict the observable from the stated model, and sweep one parameter while holding the others fixed. Compare against a simpler reference model, quantify loss and uncertainty, and state which observations would falsify the hypothesis.
Connect the ideas
See the chapter guide and further reading.