Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session X26: General AMO Physics |
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Sponsoring Units: DAMOP Chair: Dominik Schneble, Stony Brook University Room: LACC 404A |
Friday, March 9, 2018 8:00AM - 8:12AM |
X26.00001: The Autler-Townes doublet in a pulse-driven quantum emitter. Herbert Fotso If a quantum emitter is strongly driven on resonance by a laser field, its emission spectrum displays the well known Mollow triplet[1]. If on the hand the absorption from the excited state to a third, higher energy level is probed, the resulting absorption spectrum is the Autler-Townes doublet[2]. It was recently shown that when the quantum emitter is instead driven by a periodic pulse sequence, the emission spectrum obtained has strong similarities with the Mollow triplet[3]. It is then natural to ask: What is, in this case, the faith of the Autler-Townes doublet? We find that, for a three-level system in the "ladder" configuration, the absorption from the intermediate energy level to the upper level while the transition between the bottom and intermediate energy levels is driven by a periodic pulse sequence has a structure that is dictated by the pulse sequence. This is the case even when the pulse field is moderately detuned from the transition frequency. We discuss the model describing this system and present results for various system parameters. |
Friday, March 9, 2018 8:12AM - 8:24AM |
X26.00002: Frequency-renormalized Multipolaron Expansion for the Quantum Rabi Model Lei Cong, Xi-Mei Sun, Maoxin Liu, Zu-Jian Ying, Hong-Gang Luo We present a frequency-renormalized multipolaron expansion method to explore the ground state of the quantum Rabi model (QRM). The main idea is to take polaron as starting point to expand the ground state of QRM. The polarons are deformed and displaced oscillator states with variationally determined frequency renormalization and displacement parameters. This method is an extension of the previously proposed polaron concept and the coherent state expansion used in the literature, which shows high efficiency in describing the physics of the QRM. The proposed method is expected to be useful for solving other more complicated light-matter interaction models. |
Friday, March 9, 2018 8:24AM - 8:36AM |
X26.00003: Abstract Withdrawn
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Friday, March 9, 2018 8:36AM - 8:48AM |
X26.00004: Experimental Extreme Events in the Polarization of Solitary VCSELs Wendson Barbosa, Jose Rios Leite
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Friday, March 9, 2018 8:48AM - 9:00AM |
X26.00005: Exploring the Optical Energetics in Upconversion & Downconversion of LaF3:Er,Yb Alan Perez, Gupta Santosh, Madhab Pokhrel, Yuanbing Mao LaF3:Er,Yb structures were synthesized and studied for their optimal optical properties. We have taken a systematic approach in identifying the mechanism by which the radiative energy levels are populated – a topic of dispute for the erbium-ytterbium doped system. Up-conversion emissions of 2H11/2 and 4S3/2 are populated by a two-photon absorption process from 980nm excitation. Long lifetimes of these energy levels have been observed by fluorescence-lifetime, and have allowed for the quantum-yield (QY) measurements on the population of 4F9/2 and 2H9/2 coinciding to red, and blue emitting states, respectively. Furthermore, the increase in down-conversion emissions; namely, the 4I13/2–4I15/2 (1541 nm), and 4I11/2–4I13/2 (2755) nm states; have also been investigated under 980 nm excitation, and their QY has been analyzed to provide an understanding on the structural dependence on low-energy radiative emissions. |
Friday, March 9, 2018 9:00AM - 9:12AM |
X26.00006: Optical Probe with Tunable Coherence for Deep Medical Imaging Technology Pramod KUMAR, Singh Kamal P. Coherence is one of the most curcial characteristic of any laser source for various range of applications in modern imaging technologies. In this context, natural photonic structures are fascinating templates for biomimetic designs for novel optical systems, components or devices to control and manipulate light [1, 2]. While the direct use of natural biophotonic structures for optical applications is limited since they are composed of bio-polymers with rather poor mechanical and photo stability but the investigation of these structures allows both a better understanding of the host species evolutionary development and provide intriguing templates for biomimetic applications. |
Friday, March 9, 2018 9:12AM - 9:24AM |
X26.00007: Compact Tunable Mid-infrared Source Based on PPLT Whispering Gallery Mode Resonators Kunpeng Jia, Qijin Mo, Yichen Liu, Gang Zhao, Zhenda Xie, Xinjie Lv, Shining Zhu We demonstrate a tunable optical parametric oscillator in a periodically poled congruently grown lithium tantalite (PPCLT) whispering-gallery-mode resonator. The resonator is mechanically polished to millimeter size, and the quality factor is approximately 10^7 at 1064nm. Our experiments show that this kind of resonators are capable of reaching very low threshold with 57.6% slope efficiency and having wide tuning range from 1.7 to 2.85μm. Combining with its narrow resonant linewidth, it is potentially used as compact, widely tunable and narrow linewidth infrared to mid-infrared laser source. |
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