Low Power Consumption Distributed-Feedback Quantum Cascade Lasers Operating in Continuous-Wave Mode above 90℃ at λ～7.2μm

We report on the design and fabrication of λ-7.2μm distributed feedback quantum cascade lasers lot very high temperature cw operation and low electrical power consumption. The cw operation is reported above 90℃. For a 2-mm-long and 10-μm-wide laser coated with high-reflectivity on the rear facet, more than 170mW of output power is obtained at 20℃ with a threshold power consumption of 2.4 W, corresponding to 30mW with a threshold power consumption of 3.9 W at 90℃. Robust single-mode emission with a side-mode suppression ratio above 25 dB is continuously tunable by the heat sink temperature or injection current.

生态文明建设中的新型消费模式探析

十八大报告提出释放居民的消费潜力并把建设生态文明提到了一个新的高度,然而近些年来随着我国工业化进程的推进,在消费领域出现了以过度消费、攀比消费、面子消费为代表的现代主义消费方式,这种非理性的消费方式强调个体的消费欲望,结果造成极大的浪费并严重破坏了生态环境,与生态文明建设的宗旨相悖,严重阻碍了我国的生态文明建设。因此,有必要厘清生态文明及我国生态文明建设的内涵,探讨现代消费主义对生态文明建设的不利影响,并在此基础上建立节约、公平、生态、理性的新型消费模式以促进生态文明建设,达到人与人的和谐以及人与自然的和谐,实现美丽中国的梦想。