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Fast atomic line filter/field ionization detector
Optics Letters
|September 18, 2009
Summary
A new fast atomic line filter/field ionization detector (FALF/FID) uses resonant absorption and electric-field ionization for sensitive photon detection. This technology shows promise for high quantum efficiency and fast time response in scientific applications.
Area of Science:
- Atomic physics
- Laser spectroscopy
- Photon detection
Background:
- Photon detection requires sensitive and fast methods.
- Atomic vapor cells offer narrow-linewidth absorption.
- Electric field ionization is a sensitive detection technique.
Purpose of the Study:
- To experimentally demonstrate a novel fast atomic line filter/field ionization detector (FALF/FID).
- To evaluate the performance of the FALF/FID for photon detection.
Main Methods:
- Utilizing resonant absorption of signal photons in an atomic vapor cell.
- Employing a strong electric field for ionization of excited atoms.
- Using a pump laser to excite atoms to Stark-shifted Rydberg levels.
Main Results:
- Observed a tenfold enhancement in ionization rate over the continuum threshold.
- Preliminary measurements show a time response under 10 nanoseconds.
- Preliminary quantum efficiency measurements exceed 25%.
Conclusions:
- The FALF/FID demonstrates potential for high quantum efficiency and fast time response.
- Optimization of the FALF/FID could lead to narrow-linewidth photon detection.
- This detector is suitable for applications requiring sensitive and rapid photon detection.
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