Can both band gapand refractive index increase together in semiconductors?
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Yes, both band gap and refractive index can increase together in semiconductors. While there is typically an inverse correlation between band gap and refractive index, there are interesting outliers that defy this trend. In a study conducted on more than 4000 semiconductors, it was found that the negative effect of a large band gap on the refractive index can be counterbalanced in two ways. First, by limiting the difference between the direct band gap and the average optical gap, which can be achieved through a narrow distribution in energy of the optical transitions. Second, by increasing the effective frequency, which can be achieved through a high number of transitions or a high average probability for these transitions. These findings have implications for the search for new compounds in optical applications.
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10 Citations | The paper does not directly address whether both band gap and refractive index can increase together in semiconductors. |
| The paper does not directly address whether both band gap and refractive index can increase together in semiconductors. | |
| The paper confirms the general inverse trend between refractive index and band gap in semiconductors, suggesting that it is unlikely for both properties to increase together. | |
| The paper confirms the general inverse trend between refractive index and band gap in semiconductors, suggesting that it is unlikely for both properties to increase together. |
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