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Conference CommitteeSymposium Chairs
Symposium Co-chairs Program Track Chair Conference Chairs
Conference Program Committee
Session Chairs
Introduction2015 is designated as the International Year of Light. This year, we also mark the occasion of the 20th anniversary of the field of laser cooling of solids, following pioneering experiments on first observation of cooling of a ytterbium-doped glass by 0.3 K starting from room temperature (R. I. Epstein et. al., Nature 377, 500 (1995)). To rise to these occasions, this year’s Laser Refrigeration of Solids VIII (LRS VIII) conference attracted an exciting collection of 27 invited, contributed, and poster talks showcasing advancements in the field, ranging from expanding scientific understanding of laser cooling to novel applications. The papers discussed recent results categorized in five sessions: Cryogenic Refrigeration in Rare-Earth-Doped Systems, Novel Rare-Earth Doped Systems, Laser Cooling in Semiconductors, Applications and Device Concepts, and Novel Cooling Concepts. On one hand, the progress included expansion of the database of rare-earth doped cooling materials comprised now of ytterbium, thulium, erbium, and dysprosium dopants in a variety of crystal and glass hosts, both in bulk and nanoscale geometries. On the other, material science and advanced characterization methods have allowed for improvement of the quality of cooling solids to the point that operating temperatures of 90 Kelvin are now being reported by the University of New Mexico team. Liquid nitrogen temperatures may be within reach in the near future, and this progress motivates the multitude of advanced applications, ranging from basic science ones to space-borne sensor systems. Many of these applications were presented this year in a number of invited and contributed talks. In parallel with the developments in cooling of insulator-based crystals, the field has witnessed active theoretical and experimental advances in efforts to achieve optical refrigeration of semiconductors. First demonstrations of laser cooling of II-VI materials and record-breaking external quantum efficiency in III-V semiconductor heterostructures have marked milestone achievements in this direction a few years ago. This year’s meeting elaborated on new strategies for increasing performance in laser cooling of semiconductors together with development of advanced methods of high precision characterization of materials. Novel laser cooling applications that go beyond the aforementioned themes have seen new results, covering the topics of ultrastable lasers, design of low-thermal-noise coatings, design studies of laser-cooled infrared sensors and thermal link modeling. Additionally, new aspects of laser cooling included topics on optically-cooled solid state lasers, optical-refrigeration for ultra-efficient photovoltaics, redistributional laser cooling of gases and laser cooling via superradiance. We are very happy to acknowledge the growth of our community of optical refrigeration by announcing a new “Tri-Technology Device Cryocoolers” conference (TTDC) to be held annually in Baltimore, Maryland starting in 2016, as part of the SPIE DSS meeting. For more information on the venue, please refer to http://spie.org/x6765.xml. The new conference will focus on engineering and device-oriented research on cryogenic optical refrigeration, as well as thermoelectric and mechanical cryocoolers. At the same time, our conference within the Photonics West meeting will now focus more on the fundamental science of solid state cryocoolers, which would also include novel developments in fundamental aspects of thermoelectric coolers (TEC). We already covered TECs within our conference in 2013, resulting in a fruitful scientific exchange between the two fields. We would like to continue on this thread. Therefore, in light of these changes and to reflect the expanding scope of our conference we, together with the Chairs of the TTDC conference, and in agreement with SPIE representatives, have decided to rename our meeting to “Optical and Electronic Cooling of Solids”, starting in 2016. We invite you to consider your participation in both conferences and look forward to your exciting submissions next year. As always, please stay tuned for new announcements later in the year. Finally, we would like to take this opportunity to thank all members of the Program Committee and the SPIE staff for their help in organizing another very successful SPIE Laser Refrigeration of Solids Conference. Thank you to all the speakers, presenters and participants for sharing their novel developments and new insights, as well as active discussions, making 2015 another successful year for our conference. Richard I. Epstein Denis V. Seletskiy Mansoor Sheik-Bahae |
