Journal
PHOTONICS
Volume 10, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/photonics10050512
Keywords
circular birefringence; single photon; chirality; polarization measurement
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We have developed a highly sensitive optical sensor for circular birefringence using a heralded photon source. This sensor can be utilized for chirality measurements and is suitable for delicate biological samples or metrological applications that require low light intensity. Through finding the optimal operational condition, calibrating the sensor, and testing its performance over a long acquisition time, we achieved excellent stability and a sub-ppm birefringence detection limit (for a 100 μm sample), which also opens up possibilities for fundamental physics tests.
We developed a high sensitivity optical sensor for circular birefringence using a heralded photon source. The sensor can be employed for chirality measurements and, being based on single photons, can be exploited for fragile biological sample or in metrological applications where the light intensity must be kept as low as possible. We found the best operational condition; then, we calibrated the sensor and tested its performance up to a very long acquisition time, obtaining excellent stability and a sub-ppm birefringence detection limit (for a 100 mu m sample), thus paving the way for fundamental physics test as well.
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