Two-Slit Interference One Photon at a Time upper level physics experiments

The Two-Slit Interference – One Photon at a Time experiment is designed for advanced physics laboratories to demonstrate the fundamental principles of wave-particle duality and quantum mechanics. The system enables students to perform the classic two-slit interference experiment using both laser light and individual photons, allowing direct observation of interference patterns and single-photon detection. It provides hands-on experience in photon counting, diffraction, interference, and quantum behavior while illustrating the fundamental concepts of modern physics. Physics Lab Experiments from Atico Exports.

• Wave-particle duality demonstrations
• Single-photon interference studies
• Quantum mechanics education
• Photon counting experiments
• Optical interference analysis
• Diffraction experiments
• Single-photon detection
• Photomultiplier studies
• Optical signal measurement
• Advanced physics laboratory instruction

Instrument Components :

• Optical U-channel assembly
• Light-tight removable cover
• 670 nm laser source
• Low-intensity light source
• Entrance slit
• Interchangeable double-slit assemblies
• Adjustable slit blocker
• Movable detector slit
• Micrometer translation stage
• Photodiode detector
• Photon counting module
• Photomultiplier tube
• Current-to-voltage converter
• High-voltage power supply
• Pulse-height discriminator
• Light shutter
• Interference filter
• Calibration circuit

Experiments :

Interference Studies

• Two-slit interference
• Single-slit diffraction
• Comparison of single and double slit patterns
• Interference pattern analysis

Photon Counting

• Single-photon detection
• Photon count rate measurements
• Photon arrival rate analysis
• Low-light measurements

Photomultiplier Experiments

• Photomultiplier optimization
• High-voltage adjustment
• Discriminator threshold studies
• Dark current measurements
• Detector calibration

Quantum Mechanics

• Wave-particle duality demonstration
• Single-photon interference
• Quantum paradox investigation
• Photon probability distribution

Optical Measurements

• Light intensity measurements
• Diffraction pattern mapping
• Detector position analysis
• Micrometer calibration

Advanced Investigations

• Photon counting statistics
• Low-intensity spectroscopy
• Lock-in detection applications
• Optical signal enhancement

Educational Objectives :

• Understand the principles of wave-particle duality
• Study the fundamentals of quantum mechanics
• Investigate single-photon interference
• Analyze diffraction and interference patterns
• Learn photon counting techniques
• Understand photomultiplier operation
• Measure light intensity and photon count rates
• Develop practical skills in optical alignment and precision measurements
• Explore the statistical nature of photon detection

• Demonstrates two-slit interference with single photons
• Observation of wave-particle duality
• Laser and low-intensity light sources
• Single-photon detection capability
• Precision photon counting module
• Photodiode detector
• Movable detector slit with micrometer
• Interchangeable double-slit assemblies
• Adjustable slit blocker
• Variable photomultiplier high voltage
• Adjustable pulse-height discriminator
• Built-in test pulse calibration
• Independent photon-counting module operation
• Suitable for undergraduate and postgraduate laboratories