Complete wavelength mismatching effect in a Doppler broadened Y-type six-level EIT atomic medium
| Autor: | Vineet Bharti, Ajay D. Wasan |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Density matrix
Physics Field (physics) business.industry Electromagnetically induced transparency media_common.quotation_subject Asymmetry Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials symbols.namesake Wavelength Optics symbols Electrical and Electronic Engineering Physical and Theoretical Chemistry business Absorption (electromagnetic radiation) Hyperfine structure Doppler effect media_common |
| Zdroj: | Optics Communications. 324:238-244 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2014.03.057 |
| Popis: | We present a theoretical study of the Doppler broadened Y -type six-level atomic system, using a density matrix approach, to investigate the effect of varying control field wavelengths and closely spaced hyperfine levels in the 5 P 3 / 2 state of 87 Rb. The closely spaced hyperfine levels in our six-level system affect the optical properties of Y -type system and cause asymmetry in absorption profiles. Depending upon the choices of π -probe, σ + - control and σ − - control fields transitions, we consider three regimes: (i) perfect wavelength matching regime ( λ p = λ c 1 = λ c 2 ), (ii) partial wavelength mismatching regime ( λ p ≠ λ c 1 = λ c 2 ), and (iii) complete wavelength mismatching regime ( λ p ≠ λ c 1 ≠ λ c 2 ). The complete wavelength mismatching regime is further distinguished into two situations, i.e., λ c 1 λ c 2 and λ c 1 > λ c 2 . We have shown that in the room temperature atomic vapor, the asymmetric transparency window gets broadened in the partial wavelength mismatching regime as compared to the perfect wavelength matching regime. This broad transparency window also splits at the line center in the complete wavelength mismatching regime. |
| Databáze: | OpenAIRE |
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