Quantum noise and mode nonorthogonality in nonhermitian PT-symmetric optical resonators

Yoo, Gwangsu and Sim, Heung-Sun and Schomerus, Henning (2011) Quantum noise and mode nonorthogonality in nonhermitian PT-symmetric optical resonators. Physical review a, 84 (6): 063833. ISSN 1050-2947

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PT-symmetric optical resonators combine absorbing regions with active, amplifying regions. The latter are the source of radiation generated via spontaneous and stimulated emission, which embodies quantum noise and can result in lasing. We calculate the frequency-resolved output radiation intensity of such systems and relate it to a suitable measure of excess noise and mode nonorthogonality. The line shape differs depending on whether the emission lines are isolated (as for weakly amplifying, almost-Hermitian systems) or overlapping (as for the almost-degenerate resonances in the vicinity of exceptional points associated with spontaneous PT-symmetry breaking). The calculations are carried out in the scattering input-output formalism, and are illustrated for a quasi-one-dimensional resonator setup. In our derivations, we also consider the more general case of a resonator in which the amplifying and absorbing regions are not related by symmetry.

Item Type:
Journal Article
Journal or Publication Title:
Physical review a
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©2011 American Physical Society
Uncontrolled Keywords:
?? physicsatomic and molecular physics, and optics ??
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Deposited On:
04 Jan 2012 09:05
Last Modified:
09 Jul 2024 23:34