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Narrow nonlinear-optical resonances in CdSSe-doped glass
Optics Letters
|September 11, 2009
Summary
We studied glasses doped with Cadmium Sulfoselenide (CdS(1-x)Se(x)) using spectroscopy. A narrow resonance was observed, likely due to phonon-mediated inverse lifetime of a deep level trap in nonlinear optical response.
Area of Science:
- Materials Science
- Solid-State Physics
- Spectroscopy
Background:
- Glasses doped with semiconductor nanocrystals exhibit unique optical properties.
- Nonlinear optical phenomena are crucial for advanced photonic applications.
- Deep level traps can significantly influence material optoelectronic behavior.
Purpose of the Study:
- To investigate the nonlinear optical response of CdS(1-x)Se(x) doped glasses.
- To identify the origin of spectral resonances in frequency-domain spectroscopy.
- To explore the role of deep level traps in optical properties.
Main Methods:
- Frequency-domain spectroscopy.
- Backward nearly degenerate four-wave mixing.
- Utilized low-power continuous-wave (cw) tunable dye lasers.
Main Results:
- Observed a narrow resonance of 4.4 kHz at room temperature in the four-wave mixing spectrum.
- The resonance is attributed to a phonon-mediated inverse lifetime.
- The phenomenon involves a deep level trap influencing the nonlinear optical response.
Conclusions:
- The study reveals a specific mechanism governing nonlinear optical response in doped glasses.
- Phonon-mediated inverse lifetime of deep traps is a key factor.
- Understanding these resonances is vital for developing novel optical materials and devices.
